/* =========================================
   Professional Design System v2.0
   Mint & White — Enterprise Grade
   ========================================= */

/* =========================================
   Global Theme Overrides
   ========================================= */

body,
section,
footer,
main,
header.header {
  background-color: #000000 !important;
  color: #ffffff !important;
}

.card,
.skill,
.work,
.blog__card,
.certification {
  background-color: #0a0a0a !important;
  /* Slightly lighter black for cards */
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
}

.h1,
.h2,
.h3,
.h4,
.h5,
.h6 {
  color: #ffffff !important;
}

.muted,
.lead,
p {
  color: #d1d5db !important;
}

/* Ensure no light-colored sections remain */
#hero,
#about,
#hobbies,
#skills,
#work,
#blog,
#testimonials,
#contact,
#timeline {
  background: #000000 !important;
}

/* =========================================
   Full-Width Sticky Navbar
   ========================================= */

.header {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  transform: none !important;
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  background: rgba(10, 10, 10, 0.88) !important;
  backdrop-filter: blur(24px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(24px) saturate(180%) !important;
  border: none !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06) !important;
  border-radius: 0 !important;
  padding: 0 !important;
  z-index: 9999 !important;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3) !important;
  display: block !important;
}

.header__bar {
  width: 100% !important;
  max-width: 1200px !important;
  margin: 0 auto !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 0 clamp(1rem, 3vw, 2.5rem) !important;
  height: 64px !important;
}

.brand__text {
  font-size: 1.2rem !important;
  font-weight: 800 !important;
  color: #14b89c !important;
  letter-spacing: -0.02em !important;
}

.nav__list {
  display: flex !important;
  gap: 0.25rem !important;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  align-items: center !important;
}

.nav__link {
  color: #e5e7eb !important;
  text-decoration: none !important;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  padding: 0.5rem 1rem !important;
  border-radius: 8px !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  display: block !important;
  border: 1px solid transparent !important;
  position: relative !important;
}

.nav__link::after {
  content: '' !important;
  position: absolute !important;
  bottom: 0 !important;
  left: 50% !important;
  width: 0 !important;
  height: 2px !important;
  background: #14b89c !important;
  transform: translateX(-50%) !important;
  transition: width 0.3s ease !important;
}

.nav__link:hover {
  color: #14b89c !important;
  background: rgba(255, 255, 255, 0.04) !important;
  border-color: transparent !important;
}

.nav__link:hover::after {
  width: 60% !important;
}

.nav__cta {
  background: #14b89c !important;
  color: #000 !important;
  font-weight: 700 !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 8px !important;
}

.nav__cta::after {
  display: none !important;
}

.nav__cta:hover {
  background: #10b981 !important;
  color: #000 !important;
  box-shadow: 0 0 20px rgba(20, 184, 156, 0.3) !important;
}

.language-toggle {
  background: rgba(255, 255, 255, 0.05) !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
  border-radius: 8px !important;
  width: 38px !important;
  height: 38px !important;
}

.language-toggle:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  border-color: rgba(20, 184, 156, 0.3) !important;
}

/* Hero needs top padding for fixed nav */
.hero {
  padding-top: calc(64px + clamp(2rem, 6vw, 4rem)) !important;
}

@media (max-width: 860px) {
  .nav__list {
    display: none !important;
  }
}

:root {
  --mint-50: rgba(20, 184, 156, 0.1);
  --mint-100: rgba(20, 184, 156, 0.2);
  --mint-200: rgba(20, 184, 156, 0.3);
  --mint-300: #14b89c;
  --mint-400: #10b981;
  --mint-500: #14b89c;
  --mint-600: #34d399;
  --mint-700: #6ee7b7;

  --ink-950: #ffffff;
  --ink-900: #ffffff;
  --ink-800: #e5e7eb;
  --ink-700: #d1d5db;
  --ink-600: #9ca3af;
  --ink-500: #6b7280;
  --ink-400: #4b5563;

  --surface-primary: #000000;
  --surface-secondary: #0a0a0a;
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-default: rgba(255, 255, 255, 0.1);

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(20, 184, 156, 0.15);

  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  --container-width: 1200px;

  --font-display: "SF Pro Display",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Inter",
    system-ui,
    sans-serif;
  --font-body: "SF Pro Text",
    -apple-system,
    BlinkMacSystemFont,
    "Inter",
    "Segoe UI",
    system-ui,
    sans-serif;
  --font-mono: "SF Mono",
    "Cascadia Code",
    "Fira Code",
    "Consolas",
    monospace;

  --ease-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 350ms;
}

/* Button CTA & Form Fixes for Dark Theme */
.btn--primary {
  background: linear-gradient(135deg, #14b8a6, #0d9488) !important;
  color: white !important;
  box-shadow: 0 2px 12px rgba(20, 184, 166, 0.3), 0 0 0 1px rgba(20, 184, 156, 0.4) !important;
  padding: 0.875rem 1.75rem !important;
  font-weight: 700 !important;
  border-radius: 12px !important;
  border: none !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
}

.btn--primary:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 30px rgba(20, 184, 166, 0.4), 0 0 0 1px rgba(20, 184, 156, 0.5) !important;
}

/* Contact form input contrast */
.field input,
.field textarea {
  background: rgba(30, 41, 59, 0.5) !important;
  border: 1.5px solid rgba(255, 255, 255, 0.12) !important;
  color: #e2e8f0 !important;
  border-radius: 12px !important;
}

.field input:focus,
.field textarea:focus {
  border-color: #14b89c !important;
  box-shadow: 0 0 0 3px rgba(20, 184, 156, 0.2) !important;
  background: rgba(30, 41, 59, 0.7) !important;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(148, 163, 184, 0.5) !important;
}

.field label {
  color: #e5e7eb !important;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  /* Surfaces */
  --surface-primary: #0b1220;
  /* nền chính (đậm hơn 1 chút) */
  --surface-secondary: #162032;
  /* khối/card nổi hơn */
  --surface-elevated: #111a2b;

  /* Ink (text) — thang sáng dần: 900 đậm nhất (cho dark), 500 phụ */
  --ink-900: #e5edf6;
  /* text chính */
  --ink-800: #cbd5e1;
  /* text phụ mạnh */
  --ink-700: #a9b4c5;
  /* muted/đoạn mô tả */
  --ink-600: #8a96a8;
  /* nhãn nhỏ, placeholder */
  --ink-500: #6b778a;
  /* icon/viền nhẹ */

  /* Borders */
  --border-subtle: #253049;
  --border-default: #31405c;

  /* Accent / Mint trong dark mode */
  --mint-50: rgba(45, 212, 191, .10);
  --mint-200: rgba(45, 212, 191, .22);
  --mint-300: rgba(45, 212, 191, .32);
  --mint-500: #14b8a6;

  /* Shadows (dịu hơn) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, .35);
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, .40);
  --shadow-md: 0 6px 14px rgba(0, 0, 0, .45);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, .5);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, .55);
  --shadow-2xl: 0 28px 60px rgba(0, 0, 0, .6);
  --shadow-glow: 0 0 0 1px rgba(20, 184, 156, .22), 0 0 22px rgba(20, 184, 156, .16);
}

/* =========================================
     Global Resets & Base Styles
     ========================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-800);
  background: var(--surface-primary);
  overflow-x: hidden;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* =========================================
     Layout Utilities
     ========================================= */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
}

/* =========================================
     Typography System
     ========================================= */

.h1,
.h2,
.h3,
.h4,
.h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink-900);
  letter-spacing: -0.025em;
  margin: 0 0 var(--space-sm);
}

.h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

.h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}

.h4 {
  font-size: 1.25rem;
  font-weight: 600;
}

.lead {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.7;
  color: var(--ink-600);
  font-weight: 400;
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.75;
}

.body-sm {
  font-size: 0.875rem;
  line-height: 1.5;
}

.muted {
  color: var(--ink-500);
}

.accent {
  color: var(--mint-600);
  font-weight: 600;
}

/* Accessibility */
.skip {
  position: absolute;
  left: -9999px;
  top: auto;
  z-index: 9999;
}

.skip:focus {
  left: var(--space-md);
  top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--mint-600);
  color: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-weight: 600;
}

/* =========================================
     Button System
     ========================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-smooth);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-smooth);
}

.btn:hover::before {
  opacity: 1;
}

.btn--primary {
  background: linear-gradient(135deg, var(--mint-500), var(--mint-600));
  color: white;
  box-shadow: var(--shadow-sm), 0 0 0 1px rgba(20, 184, 156, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background: var(--surface-primary);
  color: var(--ink-700);
  border: 1.5px solid var(--border-default);
  box-shadow: var(--shadow-xs);
}

.btn--secondary:hover {
  border-color: var(--mint-400);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--mint-700);
}

.btn--ghost {
  background: transparent;
  color: var(--ink-700);
  padding: 0.75rem 1.25rem;
}

.btn--ghost:hover {
  background: var(--mint-50);
  color: var(--mint-700);
}

.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

/* =========================================
     Chip & Tag System
     ========================================= */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  margin: var(--space-md) 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-700);
  background: var(--mint-50);
  border: 1px solid var(--mint-200);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-smooth);
}

[data-theme="dark"] .chip {
  background: rgba(20, 184, 156, 0.08);
  border-color: rgba(20, 184, 156, 0.25);
  color: #d1fae5;
}

.chip:hover {
  background: var(--mint-100);
  border-color: var(--mint-300);
  transform: translateY(-1px);
}

[data-theme="dark"] .chip:hover {
  background: rgba(20, 184, 156, 0.15);
  border-color: rgba(20, 184, 156, 0.4);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-600);
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.tag:hover {
  border-color: var(--mint-300);
  color: var(--mint-700);
  background: var(--mint-50);
}

/* =========================================
     Section Components
     ========================================= */

.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
  position: relative;
}

.section__head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-2xl);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--mint-700);
  background: var(--mint-100);
  border: 1px solid var(--mint-200);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

/* =========================================
     Header & Navigation
     ========================================= */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-base) var(--ease-smooth);
  width: 100%;
}

[data-theme="dark"] .header {
  background: rgba(10, 15, 30, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header--scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .header--scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 100%;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.125rem;
  transition: transform var(--duration-base) var(--ease-smooth);
}

.brand:hover {
  transform: scale(1.02);
}

.brand__logo {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--mint-500), var(--mint-700));
  color: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  font-weight: 800;
  font-size: 1.25rem;
}

.brand__text {
  color: var(--ink-900);
  letter-spacing: -0.02em;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav__link {
  padding: var(--space-xs) var(--space-sm);
  color: var(--ink-700);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-smooth);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--mint-500);
  transform: translateX(-50%);
  transition: width var(--duration-base) var(--ease-smooth);
}

.nav__link:hover {
  color: var(--mint-700);
  background: var(--mint-50);
}

.nav__link:hover::after {
  width: 60%;
}

/* Header Controls */
.header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Language Selector with Globe Icon */
.language-selector {
  position: relative;
  margin-left: var(--space-md);
}

.language-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.language-toggle:hover {
  background: var(--mint-50);
  border-color: var(--mint-400);
  transform: scale(1.05);
}

.language-toggle:focus {
  outline: none;
  border-color: var(--mint-500);
  box-shadow: 0 0 0 3px rgba(20, 184, 156, 0.1);
}

[data-theme="dark"] .language-toggle {
  border-color: var(--border-subtle);
}

[data-theme="dark"] .language-toggle:hover {
  background: var(--ink-800);
  border-color: var(--mint-500);
}

.language-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.language-menu {
  position: absolute;
  top: calc(100% + var(--space-xs));
  right: 0;
  min-width: 200px;
  max-height: 400px;
  overflow-y: auto;
  background: var(--surface-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--duration-base) var(--ease-smooth);
  z-index: 1000;
}

.language-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

[data-theme="dark"] .language-menu {
  background: var(--surface-secondary);
  border-color: var(--border-subtle);
}

.language-menu__header {
  padding: var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-700);
  border-bottom: 1px solid var(--border-subtle);
}

[data-theme="dark"] .language-menu__header {
  color: var(--ink-300);
}

.language-menu__list {
  list-style: none;
  margin: 0;
  padding: var(--space-xs) 0;
}

.language-option {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  color: var(--ink-700);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-smooth);
  cursor: pointer;
}

.language-option:hover {
  background: var(--mint-50);
  color: var(--mint-700);
}

.language-option.active {
  background: var(--mint-100);
  color: var(--mint-700);
  font-weight: 600;
}

[data-theme="dark"] .language-option {
  color: var(--ink-300);
}

[data-theme="dark"] .language-option:hover {
  background: var(--ink-800);
  color: var(--mint-400);
}

[data-theme="dark"] .language-option.active {
  background: var(--ink-800);
  color: var(--mint-400);
}

/* Hide Google Translate default widget and banner */
#google_translate_element {
  display: none !important;
}

/* Hide Google Translate banner completely */
.goog-te-banner-frame,
.goog-te-balloon-frame,
.goog-te-banner,
.goog-te-banner-frame.skiptranslate,
div[id*="google_translate_element"],
div[class*="goog-te-banner"],
div[class*="goog-te-banner-frame"],
iframe[title*="Google Translate"],
iframe[src*="translate.googleapis.com"],
.skiptranslate {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  height: 0 !important;
  width: 0 !important;
  overflow: hidden !important;
  position: absolute !important;
  left: -9999px !important;
}

/* Remove top margin/padding that Google Translate adds */
body {
  top: 0 !important;
  margin-top: 0 !important;
  padding-top: 0 !important;
  position: static !important;
}

html {
  top: 0 !important;
  margin-top: 0 !important;
  padding-top: 0 !important;
  position: static !important;
  overflow: visible !important;
}

/* Override Google Translate inline style on html.translated-ltr/rtl */
html.translated-ltr,
html.translated-rtl {
  top: 0 !important;
  margin-top: 0 !important;
}

/* Ensure header is at the top */
.header {
  top: 0 !important;
  margin-top: 0 !important;
}

/* Dark Mode Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.theme-toggle__button {
  position: relative;
  width: 48px;
  height: 24px;
  background: var(--border-default);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--duration-base) var(--ease-smooth);
  border: none;
  padding: 0;
}

.theme-toggle__button:hover {
  background: var(--mint-300);
}

[data-theme="dark"] .theme-toggle__button {
  background: var(--mint-600);
}

.theme-toggle__slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform var(--duration-base) var(--ease-smooth);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .theme-toggle__slider {
  transform: translateX(24px);
}

.theme-toggle__icon {
  font-size: 1.125rem;
  color: var(--ink-700);
  transition: color var(--duration-fast) var(--ease-smooth);
}

[data-theme="dark"] .theme-toggle__icon {
  color: var(--ink-300);
}

/* Mobile Navigation */
.nav__toggle {
  display: none;
}

.nav__button {
  display: none;
  width: 28px;
  height: 24px;
  position: relative;
  cursor: pointer;
  z-index: 101;
}

.nav__button span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--ink-800);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-smooth);
}

.nav__button span:nth-child(1) {
  top: 0;
}

.nav__button span:nth-child(2) {
  top: 11px;
}

.nav__button span:nth-child(3) {
  bottom: 0;
}

@media (max-width: 860px) {
  .header__controls {
    gap: var(--space-sm);
  }

  .language-selector {
    margin-left: var(--space-sm);
  }

  .language-toggle {
    width: 36px;
    height: 36px;
  }

  .language-icon {
    font-size: 1.125rem;
  }

  .language-menu {
    min-width: 180px;
    max-height: 300px;
    right: 0;
  }

  .theme-toggle {
    gap: var(--space-sm);
  }

  .theme-toggle__icon {
    font-size: 1rem;
  }

  .theme-toggle__button {
    width: 44px;
    height: 22px;
  }

  .theme-toggle__slider {
    width: 18px;
    height: 18px;
  }

  [data-theme="dark"] .theme-toggle__slider {
    transform: translateX(22px);
  }

  .nav__button {
    display: block;
  }

  .nav {
    position: fixed;
    inset: 72px 0 auto 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform var(--duration-slow) var(--ease-smooth);
  }

  [data-theme="dark"] .nav {
    background: rgba(15, 23, 42, 0.95);
  }

  .nav__list {
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-xs);
  }

  .nav__link {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
  }

  .nav__toggle:checked~.nav__button span:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
  }

  .nav__toggle:checked~.nav__button span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle:checked~.nav__button span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
  }

  .nav__toggle:checked~.nav {
    transform: translateY(0);
  }
}

/* =========================================
   Hero Section (fixed band overlap)
   ========================================= */

.hero {
  position: relative;
  padding: clamp(4rem, 10vw, 6rem) 0 clamp(3rem, 8vw, 5rem);
  background: linear-gradient(180deg, var(--mint-50) 0%, var(--surface-primary) 100%);
  isolation: isolate;
  /* ✅ tạo stacking context để band nằm sau */
}

[data-theme="dark"] .hero {
  background: linear-gradient(180deg, #1e293b 0%, var(--surface-primary) 100%);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
}

@media (max-width: 980px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

.hero__content {
  animation: fadeInUp 0.8s var(--ease-smooth);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-xl) 0 var(--space-lg);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.stat {
  min-width: 120px;
  text-align: center;
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-smooth);
}

.stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--mint-200);
}

.stat__num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--mint-600);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat__label {
  display: block;
  font-size: 0.875rem;
  color: var(--ink-500);
}

.hero__figure {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
  animation: fadeInUp 0.8s 0.2s var(--ease-smooth) backwards;
}

.hero__3d {
  width: 100%;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-2xl);
  transition: transform var(--duration-slow) var(--ease-smooth);
}

.hero__3d:hover {
  transform: scale(1.02) translateY(-8px);
}

.hero__photo {
  position: absolute;
  right: -1rem;
  bottom: -1rem;
  width: 180px;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: var(--radius-xl);
  border: 4px solid var(--surface-primary);
  box-shadow: var(--shadow-xl);
  transition: transform var(--duration-base) var(--ease-smooth);
}

.hero__photo:hover {
  transform: scale(1.05) rotate(2deg);
}

.float {
  position: absolute;
  font-size: 1.5rem;
  opacity: 0.6;
  animation: float 6s var(--ease-smooth) infinite;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.f1 {
  top: -1rem;
  left: 1rem;
}

.f2 {
  top: 1rem;
  right: -0.5rem;
  animation-delay: 0.7s;
}

.f3 {
  bottom: 2rem;
  left: -0.75rem;
  animation-delay: 1.2s;
}

.f4 {
  bottom: 3rem;
  right: -1rem;
  animation-delay: 1.8s;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-12px) rotate(5deg);
  }
}

/* ✅ Band nằm sau và thấp xuống, không che nội dung */
.band {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -56px;
  /* đẩy dải xuống một chút */
  height: 240px;
  /* có thể tăng/giảm tùy ý */
  background: radial-gradient(ellipse 1400px 240px at 50% 10%, var(--mint-100), transparent 70%);
  pointer-events: none;
  z-index: -1;
  /* nằm sau nội dung hero */
}

/* =========================================
     Card System
     ========================================= */

.card {
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-smooth);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--mint-200);
}

.card__body {
  padding: var(--space-lg);
}

/* =========================================
     About Section
     ========================================= */

.about__grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-lg);
}

@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr;
  }
}

.about__profile {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: var(--space-lg);
  padding: var(--space-xl);
}

@media (max-width: 720px) {
  .about__profile {
    grid-template-columns: 1fr;
  }
}

.profile__media {
  position: relative;
}

.profile__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-subtle);
  transition: transform var(--duration-base) var(--ease-smooth);
}

.profile__photo:hover {
  transform: scale(1.02);
}

.profile__badge {
  position: absolute;
  left: var(--space-md);
  bottom: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--ink-700);
}

.profile__body {
  align-self: center;
}

.about__info {
  padding: var(--space-xl);
}

.list {
  margin: var(--space-md) 0;
  padding-left: 1.5rem;
  color: var(--ink-600);
}

.list li {
  margin-bottom: var(--space-xs);
}

.quote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--mint-50);
  border: 1px solid var(--mint-200);
  border-left: 4px solid var(--mint-500);
  border-radius: var(--radius-md);
  color: var(--ink-700);
  font-style: italic;
}




/* ========== Hobbies masonry ========== */
.hobbies .upload {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: .75rem;
}

.hobbies .btn {
  cursor: pointer;
  display: inline-block;
  padding: .55rem .9rem;
  border-radius: 10px;
  background: var(--brand, #111);
  color: #fff;
}

.hobbies .btn:hover {
  opacity: .9;
}

/* Masonry bằng CSS columns để tạo hiệu ứng xếp gạch */
.masonry {
  column-count: 4;
  /* desktop */
  column-gap: 1rem;
}

@media (max-width: 1200px) {
  .masonry {
    column-count: 3;
  }
}

@media (max-width: 900px) {
  .masonry {
    column-count: 2;
  }
}

@media (max-width: 560px) {
  .masonry {
    column-count: 1;
  }
}

.masonry__item {
  break-inside: avoid;
  margin-bottom: 1rem;
  position: relative;
  transform: translateY(10px);
  opacity: 0;
  animation: fadeUp .7s ease forwards;
}

.masonry__item:nth-child(2n) {
  animation-delay: .05s;
}

.masonry__item:nth-child(3n) {
  animation-delay: .12s;
}

.masonry__item:nth-child(5n) {
  animation-delay: .2s;
}

.masonry__item img {
  width: 100%;
  display: block;
  border-radius: 14px;
  box-shadow: 0 6px 22px rgba(0, 0, 0, .16);
  background: #f4f4f4;
  object-fit: cover;
}

/* Hover overlay nhè nhẹ */
.masonry__item::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: linear-gradient(to top, rgba(0, 0, 0, .25), transparent 60%);
  opacity: 0;
  transition: opacity .25s;
}

.masonry__item:hover::after {
  opacity: 1;
}

@keyframes fadeUp {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* =========================================
     Skills Section (Modern Dark Bento Design)
     ========================================= */

#skills {
  background: #000 !important;
  padding: 100px 0;
  color: #fff !important;
}

#skills .h2 {
  color: #fff !important;
  font-size: 2.5rem;
  margin-bottom: 4rem;
  font-weight: 800;
}

.skills__wrap {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 2.5rem;
}

.skill {
  background: #0a0a0a !important;
  /* Bento card background */
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius: 24px !important;
  padding: 2.5rem !important;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.skill:hover {
  transform: translateY(-8px);
  border-color: rgba(20, 184, 156, 0.3) !important;
  background: #0f0f0f !important;
}

.skill__head {
  margin-bottom: 1.5rem !important;
}

.skill__head .h3 {
  color: #fff !important;
  font-size: 1.5rem !important;
  font-weight: 700;
  margin: 0;
}

.skill .muted {
  color: #9ca3af !important;
  font-size: 0.95rem !important;
  line-height: 1.6;
  margin-bottom: 2rem !important;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  list-style: none;
  margin-top: auto;
}

.badges li {
  background: rgba(255, 255, 255, 0.03) !important;
  color: #e5e7eb !important;
  padding: 6px 12px !important;
  border-radius: 100px !important;
  font-size: 0.75rem !important;
  font-weight: 500 !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  transition: all 0.3s ease !important;
}

.badges li:hover {
  background: rgba(20, 184, 156, 0.1) !important;
  color: #14b89c !important;
  border-color: #14b89c !important;
  transform: scale(1.05);
}

@media (max-width: 1100px) {
  .skills__wrap {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 768px) {
  .skills__wrap {
    grid-template-columns: 1fr !important;
  }

  .skill {
    padding: 1.5rem !important;
  }
}

/* =========================================
     Grid Layouts
     ========================================= */

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1040px) {
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

/* =========================================
     Work/Portfolio Section (Sync with Blog)
     ========================================= */

#work {
  background: #000 !important;
  padding: 100px 0;
  color: #fff !important;
}

#work .h2 {
  color: #fff !important;
  font-size: 2.5rem;
  margin-bottom: 4rem;
  font-weight: 800;
}

.portfolio .grid--3 {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 3rem;
}

.work {
  position: relative;
  background: #000 !important;
  border-radius: 0;
  overflow: visible;
  transition: transform 0.4s cubic-bezier(0.2, 1, 0.3, 1);
  border: none !important;
  box-shadow: none !important;
  display: flex;
  flex-direction: column !important;
  cursor: pointer;
  min-width: 0 !important;
  flex: none !important;
  height: 100%;
}

.work:hover {
  transform: translateY(-10px);
}

.work__media {
  width: 100% !important;
  height: 200px !important;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}

.work__media img {
  width: 100%;
  height: 100% !important;
  object-fit: cover;
  display: block;
  transition: transform 0.8s ease;
}

.work:hover img {
  transform: scale(1.05);
}

.work__body {
  padding: 0 !important;
  background: transparent !important;
  color: #fff !important;
  width: 100% !important;
}

.work-meta {
  font-size: 0.75rem;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.work .h3 {
  color: #fff !important;
  font-size: 1.35rem !important;
  line-height: 1.3;
  margin: 0 !important;
  font-weight: 700;
  text-shadow: none !important;
}

/* Hide old elements for clean grid view */
.work .tech,
.work .actions,
.work .muted {
  display: none !important;
}

@media (max-width: 1024px) {
  .portfolio .grid--3 {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .portfolio .grid--3 {
    grid-template-columns: 1fr !important;
  }
}

/* =========================================
     Blog Cards (Framer-Inspired Modern Layout)
     ========================================= */

.blog__slider {
  display: block !important;
  /* Disable old slider grid */
}

/* =========================================
     Blog Section (Modern Full Dark Design)
     ========================================= */

.blog {
  background: #000 !important;
  padding: 100px 0;
}

.blog .h2 {
  color: #fff !important;
  font-size: 2.5rem;
  margin-bottom: 4rem;
  font-weight: 800;
}

.blog__slider {
  display: block !important;
}

.blog__track {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  /* 3 Equal Columns */
  gap: 3rem;
  padding: 0;
  overflow: visible !important;
}

.blog__card {
  position: relative;
  background: #000 !important;
  /* Pure black card */
  border-radius: 0;
  overflow: visible;
  transition: transform 0.4s cubic-bezier(0.2, 1, 0.3, 1);
  border: none !important;
  box-shadow: none !important;
  display: flex;
  flex-direction: column !important;
  cursor: pointer;
  min-width: 0 !important;
  flex: none !important;
  height: 100%;
}

.blog__card:hover {
  transform: translateY(-10px);
}

.blog__card .blog__media {
  width: 100% !important;
  aspect-ratio: 16 / 10;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}

.blog__card img {
  width: 100%;
  height: 100% !important;
  object-fit: cover;
  display: block;
  transition: transform 0.8s ease;
}

.blog__card:hover img {
  transform: scale(1.05);
}

.blog__card .blog__body {
  position: static !important;
  padding: 0 !important;
  /* Zero padding for clean look */
  background: transparent !important;
  color: #fff !important;
  width: 100% !important;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.blog-meta {
  font-size: 0.75rem;
  color: #9ca3af;
  /* Light gray info */
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.blog-meta .dot {
  opacity: 0.5;
}

.blog__card .blog__body .h3 {
  color: #fff !important;
  font-size: 1.35rem !important;
  line-height: 1.3;
  margin: 0 !important;
  font-weight: 700;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  /* Title limited to 2-3 lines */
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-shadow: none !important;
}

/* No buttons, whole card is the link */
.blog__card .read,
.blog__card .excerpt {
  display: none !important;
  /* Remove excerpt and button for minimalist design */
}

@media (max-width: 1024px) {
  .blog__track {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .blog__track {
    grid-template-columns: 1fr !important;
  }
}

.blog__card .blog__body .read {
  margin-top: 0.25rem;
  color: var(--mint-600) !important;
  font-weight: 700;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

@media (max-width: 992px) {
  .blog__track {
    grid-template-columns: 1fr;
  }

  .blog__card {
    height: auto;
    flex-direction: column !important;
  }

  .blog__card .blog__media {
    width: 100%;
    height: 180px !important;
  }
}

.blog__card:hover .read {
  gap: 0.75rem;
}

/* Hide Slider controls as we are now using a Grid */
.blog__nav,
.blog__dots {
  display: none !important;
}

@media (max-width: 768px) {
  .blog__track {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.blog__nav {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-default);
  background: var(--surface-primary);
  color: var(--ink-700);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.blog__nav:hover {
  background: var(--mint-50);
  border-color: var(--mint-400);
  color: var(--mint-700);
  transform: translateY(-1px);
}

/* Dots */
.blog__dots {
  position: absolute;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
}

.blog__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .45);
  border: 1px solid rgba(255, 255, 255, .6);
}

.blog__dot--active {
  background: #14b89c;
  border-color: #14b89c;
}

/* =========================================
     Blog Modal Overlay (Enhanced Reading Experience)
     ========================================= */

.blog-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(3, 7, 18, 0.92);
  /* Darker focus */
  backdrop-filter: blur(12px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  overflow-y: auto;
}

.blog-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.blog-modal {
  position: relative;
  background: var(--surface-primary);
  border-radius: 24px;
  max-width: 1100px;
  /* Impressive width */
  width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.5);
  transform: scale(0.98) translateY(20px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  margin: auto;
}

.blog-modal-overlay.active .blog-modal {
  transform: scale(1) translateY(0);
}

.blog-modal__close {
  position: sticky;
  top: 1.5rem;
  right: 1.5rem;
  float: right;
  width: 44px;
  height: 44px;
  border: none;
  background: var(--surface-secondary);
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ink-600);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  margin-bottom: -44px;
  /* Floating close button */
}

.blog-modal__close:hover {
  background: var(--ink-900);
  color: #fff;
  transform: rotate(90deg);
}

.blog-modal__content {
  padding: clamp(1.5rem, 6vw, 4.5rem);
  /* Generous whitespace */
}

.blog-article {
  max-width: 100%;
}

.blog-article__header {
  margin-bottom: 4rem;
  text-align: center;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.blog-article__header .tag {
  display: inline-block;
  margin-bottom: 1.5rem;
  padding: 6px 16px;
  font-weight: 600;
}

.blog-article__header .h1 {
  margin: 1rem 0 1.5rem !important;
  font-size: clamp(2rem, 5vw, 3.5rem) !important;
  line-height: 1.1;
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: -0.02em;
}

.blog-article__meta {
  font-size: 1rem;
  color: var(--ink-500);
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.blog-article__image {
  margin: 4rem 0;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.blog-article__image img {
  width: 100%;
  height: auto;
  display: block;
}

.blog-article__content {
  max-width: 760px;
  /* Optimal line length for focus */
  margin: 0 auto;
  font-size: 1.18rem;
  line-height: 1.85;
  color: var(--ink-800);
}

.blog-article__content p {
  margin-bottom: 2rem;
}

.blog-article__content .lead {
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink-900);
  margin-bottom: 3rem;
}

.blog-article__content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin: 4rem 0 1.5rem;
  color: var(--ink-900);
}

.blog-article__content .quote {
  font-size: 1.6rem;
  font-style: italic;
  border-left: 5px solid var(--mint-400);
  padding-left: 2rem;
  margin: 4rem 0;
  color: var(--ink-900);
  font-family: serif;
}

/* (Duplicate rules removed — primary rules above handle these) */

.blog-article__image figcaption {
  margin-top: var(--space-sm);
  padding: 0 var(--space-sm);
  text-align: center;
  font-style: italic;
}

@media (max-width: 720px) {
  .blog-modal {
    max-height: 95vh;
    border-radius: var(--radius-lg);
  }

  .blog-modal__content {
    padding: var(--space-lg);
  }

  .blog-article__header {
    padding-right: var(--space-lg);
  }

  .blog-modal__close {
    top: var(--space-sm);
    right: var(--space-sm);
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }

  .blog-article__content {
    font-size: 0.9375rem;
  }
}

/* =========================================
     Forms
     ========================================= */

.form {
  padding: var(--space-2xl);
  max-width: 800px;
  margin: 0 auto;
}

.form__row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

@media (max-width: 720px) {
  .form__row {
    grid-template-columns: 1fr;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.field label {
  font-weight: 600;
  color: var(--ink-700);
  font-size: 0.9375rem;
}

.field input,
.field textarea {
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
  color: var(--ink-800);
  transition: all var(--duration-fast) var(--ease-smooth);
}

[data-theme="dark"] .field input,
[data-theme="dark"] .field textarea {
  background: rgba(30, 41, 59, 0.6);
  border-color: rgba(255, 255, 255, 0.15);
  color: #e2e8f0;
}

[data-theme="dark"] .field input::placeholder,
[data-theme="dark"] .field textarea::placeholder {
  color: rgba(148, 163, 184, 0.6);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--mint-500);
  box-shadow: 0 0 0 3px rgba(20, 184, 156, 0.1);
}

[data-theme="dark"] .field input:focus,
[data-theme="dark"] .field textarea:focus {
  border-color: var(--mint-500);
  box-shadow: 0 0 0 3px rgba(20, 184, 156, 0.2);
  background: rgba(30, 41, 59, 0.8);
}

.form__note {
  margin-top: var(--space-md);
  text-align: center;
}

/* =========================================
     Footer
     ========================================= */

.footer {
  padding: var(--space-2xl) 0;
  background: var(--surface-secondary);
  border-top: 1px solid var(--border-subtle);
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}

.brand--footer {
  justify-content: center;
}

.footer__copyright {
  margin: 0;
}

.social {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  /* Tăng khoảng cách giữa các icon */
  list-style: none;
  margin: 0;
  padding: 0;
}

.social li {
  margin: 0;
  /* Đảm bảo không có margin thừa */
}

.social a {
  color: var(--ink-700);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.social a:hover {
  color: var(--mint-700);
  background: var(--mint-50);
}

/* =========================================
   Toast Notifications
   ========================================= */

.toast {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  min-width: 300px;
  max-width: 500px;
  padding: var(--space-md) var(--space-lg);
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-base) var(--ease-smooth);
}

.toast--show {
  opacity: 1;
  transform: translateY(0);
}

.toast--success {
  border-left: 4px solid var(--mint-500);
}

.toast--error {
  border-left: 4px solid #ef4444;
}

.toast--info {
  border-left: 4px solid #3b82f6;
}

.toast__message {
  flex: 1;
  color: var(--ink-800);
  font-weight: 500;
}

.toast__close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ink-500);
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.toast__close:hover {
  color: var(--ink-800);
}

/* =========================================
   Lightbox
   ========================================= */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10, 13, 20, 0.95);
  backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-base) var(--ease-smooth);
}

.lightbox--active {
  opacity: 1;
  visibility: visible;
}

.lightbox__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.lightbox__image {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
}

.lightbox__caption {
  color: white;
  text-align: center;
  font-size: 0.875rem;
  padding: var(--space-sm);
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-smooth);
  z-index: 10;
}

.lightbox__close {
  top: var(--space-lg);
  right: var(--space-lg);
}

.lightbox__prev {
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox__next {
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.lightbox__prev:hover {
  transform: translateY(-50%) scale(1.1);
}

.lightbox__next:hover {
  transform: translateY(-50%) scale(1.1);
}

/* =========================================
   Testimonials
   ========================================= */

.testimonials {
  padding: var(--space-3xl) 0;
}

.testimonials__carousel {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial {
  display: none;
  padding: var(--space-2xl);
  text-align: center;
}

.testimonial--active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.testimonial__text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--ink-700);
  font-style: italic;
  margin-bottom: var(--space-lg);
  position: relative;
}

.testimonial__text::before,
.testimonial__text::after {
  content: '"';
  font-size: 3rem;
  color: var(--mint-300);
  position: absolute;
  opacity: 0.3;
}

.testimonial__text::before {
  top: -1rem;
  left: -1rem;
}

.testimonial__text::after {
  bottom: -2rem;
  right: -1rem;
}

.testimonial__author {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.testimonial__name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink-900);
  margin: 0;
}

.testimonial__role {
  font-size: 0.875rem;
  color: var(--ink-500);
  margin: 0;
}

.testimonial__rating {
  color: #fbbf24;
  font-size: 1.25rem;
  letter-spacing: 2px;
}

.testimonials__controls {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.testimonials__prev,
.testimonials__next {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-default);
  background: var(--surface-primary);
  color: var(--ink-700);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.testimonials__prev:hover,
.testimonials__next:hover {
  background: var(--mint-50);
  border-color: var(--mint-400);
  color: var(--mint-700);
}

/* =========================================
   Progress Bars
   ========================================= */

.progress {
  margin: var(--space-md) 0;
}

.progress__label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-700);
}

.progress__bar-container {
  width: 100%;
  height: 8px;
  background: var(--surface-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--mint-500), var(--mint-600));
  border-radius: var(--radius-full);
  transition: width 1s var(--ease-smooth);
  width: 0%;
}

/* =========================================
   Timeline
   ========================================= */

.timeline {
  position: relative;
  padding: var(--space-2xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-subtle);
  transform: translateX(-50%);
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-2xl);
  display: flex;
  align-items: center;
}

.timeline__item:nth-child(odd) {
  flex-direction: row;
}

.timeline__item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline__content {
  flex: 1;
  padding: var(--space-lg);
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  max-width: 45%;
}

.timeline__item:nth-child(odd) .timeline__content {
  margin-right: var(--space-lg);
}

.timeline__item:nth-child(even) .timeline__content {
  margin-left: var(--space-lg);
}

.timeline__marker {
  position: absolute;
  left: 50%;
  width: 16px;
  height: 16px;
  background: var(--mint-500);
  border: 3px solid var(--surface-primary);
  border-radius: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.timeline__date {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--mint-600);
  margin-bottom: var(--space-xs);
}

.timeline__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: var(--space-xs);
}

.timeline__description {
  font-size: 0.9375rem;
  color: var(--ink-600);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .timeline::before {
    left: var(--space-md);
  }

  .timeline__item {
    flex-direction: row !important;
  }

  .timeline__content {
    max-width: calc(100% - 3rem);
    margin-left: var(--space-xl) !important;
    margin-right: 0 !important;
  }

  .timeline__marker {
    left: var(--space-md);
  }
}

/* =========================================
   Certifications
   ========================================= */

/* =========================================
   Certifications (Modern Dark Design)
   ========================================= */

.certifications {
  background: #000 !important;
  padding: 100px 0;
  color: #fff !important;
}

.certifications .h2 {
  color: #fff !important;
  font-size: 2.5rem;
  margin-bottom: 4rem;
  font-weight: 800;
}

.certifications__grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)) !important;
  gap: 2.5rem;
}

.certification {
  background: #0a0a0a !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius: 24px !important;
  padding: 2.5rem !important;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  height: 100%;
}

.certification:hover {
  transform: translateY(-10px);
  border-color: rgba(20, 184, 156, 0.3) !important;
  background: #0f0f0f !important;
}

.certification__icon {
  width: 56px;
  height: 56px;
  background: rgba(20, 184, 156, 0.1);
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: #14b89c;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

.certification.card:hover .certification__icon {
  background: #14b89c;
  color: #fff;
  box-shadow: 0 0 20px rgba(20, 184, 156, 0.4);
}

.certification__name {
  color: #fff !important;
  font-size: 1.25rem !important;
  font-weight: 700;
  margin-bottom: 0.5rem !important;
  line-height: 1.3;
}

.certification__issuer {
  color: #9ca3af !important;
  font-size: 0.9rem !important;
  margin-bottom: 0.25rem !important;
}

.certification__date {
  color: #6b7280 !important;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  .certification {
    padding: 1.5rem !important;
  }
}
}

/* =========================================
   Search
   ========================================= */

.search {
  position: relative;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.search--compact {
  max-width: 220px;
  margin: 0;
}

.search__input {
  width: 100%;
  padding: var(--space-md) var(--space-xl) var(--space-md) var(--space-md);
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: 1rem;
  background: var(--surface-primary);
  color: var(--ink-800);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.search--compact .search__input {
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
}

.search__input:focus {
  outline: none;
  border-color: var(--mint-500);
  box-shadow: 0 0 0 3px rgba(20, 184, 156, 0.1);
}

.search__button {
  position: absolute;
  right: var(--space-xs);
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--mint-500);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.search--compact .search__button {
  width: 32px;
  height: 32px;
  font-size: 0.9rem;
}

.search__button:hover {
  background: var(--mint-600);
  transform: translateY(-50%) scale(1.05);
}

.search__dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--surface-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-sm);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: all var(--duration-fast) var(--ease-smooth);
  z-index: 1000;
}

.search__dropdown.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.search__hint {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-500);
  margin-bottom: var(--space-xs);
}

.search__results {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.search__result {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.search__result:hover,
.search__result:focus-within {
  background: var(--mint-50);
  transform: translateX(2px);
}

.search__result-title {
  font-weight: 600;
  color: var(--ink-800);
  font-size: 0.9rem;
}

.search__result-description {
  font-size: 0.78rem;
  color: var(--ink-500);
}

.search__result-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  color: var(--mint-600);
  background: rgba(20, 184, 156, 0.08);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  margin-top: 4px;
  width: fit-content;
}

/* =========================================
   Newsletter
   ========================================= */

.newsletter {
  background: var(--mint-50);
  border: 1px solid var(--mint-200);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
}

.newsletter__form {
  display: flex;
  gap: var(--space-sm);
  max-width: 500px;
  margin: var(--space-lg) auto 0;
}

.newsletter__input {
  flex: 1;
  padding: var(--space-md);
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background: var(--surface-primary);
  color: var(--ink-800);
}

.newsletter__input:focus {
  outline: none;
  border-color: var(--mint-500);
  box-shadow: 0 0 0 3px rgba(20, 184, 156, 0.1);
}

.newsletter__button {
  padding: var(--space-md) var(--space-lg);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .newsletter__form {
    flex-direction: column;
  }
}

/* =========================================
   Share Buttons
   ========================================= */

.share {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.share__button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--ink-700);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.share__button:hover {
  background: var(--mint-50);
  border-color: var(--mint-300);
  color: var(--mint-700);
}

/* =========================================
   Loading States
   ========================================= */

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--mint-200);
  border-top-color: var(--mint-600);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.skeleton {
  background: linear-gradient(90deg, var(--surface-secondary) 25%, var(--surface-primary) 50%, var(--surface-secondary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

/* =========================================
   CV Download Button
   ========================================= */

.cv-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface-primary);
  border: 2px solid var(--mint-500);
  border-radius: var(--radius-md);
  color: var(--mint-700);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--duration-base) var(--ease-smooth);
}

.cv-download:hover {
  background: var(--mint-500);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* =========================================
   Enhanced Animations
   ========================================= */

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-on-scroll {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  animation: slideInUp 0.6s ease forwards;
}

/* =========================================
   Accessibility Improvements
   ========================================= */

.skip:focus {
  position: fixed;
  left: var(--space-md);
  top: var(--space-md);
  z-index: 10000;
  padding: var(--space-sm) var(--space-md);
  background: var(--mint-600);
  color: white;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--mint-500);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}