/* =========================================================================
   ARPIT PAL — PERSONAL SITE
   Liquid Glass Design System
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. DESIGN TOKENS
   ------------------------------------------------------------------------- */
:root {
  /* Type */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  /* Fluid type scale */
  --fs-hero: clamp(2.75rem, 6vw + 1rem, 6.5rem);
  --fs-h1: clamp(2rem, 3vw + 1rem, 3.25rem);
  --fs-h2: clamp(1.5rem, 2vw + 0.5rem, 2.25rem);
  --fs-h3: clamp(1.15rem, 1vw + 0.6rem, 1.5rem);
  --fs-body: clamp(1rem, 0.3vw + 0.9rem, 1.0625rem);
  --fs-small: clamp(0.8125rem, 0.2vw + 0.75rem, 0.9rem);
  --fs-micro: 0.75rem;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 7rem;

  /* Radii */
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-full: 999px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 160ms;
  --dur-mid: 320ms;
  --dur-slow: 700ms;

  /* Layout */
  --content-w: 1180px;
  --nav-h: 68px;

  color-scheme: light;

  /* ---- LIGHT THEME ---- */
  --bg-base: #eef1f8;
  --bg-blob-1: rgba(120, 140, 255, 0.35);
  --bg-blob-2: rgba(255, 150, 230, 0.28);
  --bg-blob-3: rgba(120, 255, 220, 0.25);

  --text-primary: #171a23;
  --text-secondary: #4b5163;
  --text-tertiary: #7c8299;

  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.78);
  --glass-bg-soft: rgba(255, 255, 255, 0.38);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-border-soft: rgba(120, 130, 160, 0.16);
  --glass-shadow: 0 8px 30px rgba(31, 38, 70, 0.10), 0 1px 1px rgba(31,38,70,0.05);
  --glass-shadow-lg: 0 20px 60px rgba(31, 38, 70, 0.16);
  --glass-highlight: rgba(255, 255, 255, 0.9);

  --accent-1: #5b6ef5;
  --accent-2: #a566ff;
  --accent-grad: linear-gradient(135deg, var(--accent-1), var(--accent-2));

  --input-bg: rgba(255, 255, 255, 0.55);
  --danger: #e5484d;
  --success: #1fa971;

  --focus-ring: 0 0 0 3px rgba(91, 110, 245, 0.45);
}

[data-theme='dark'] {
  color-scheme: dark;

  --bg-base: #0a0b10;
  --bg-blob-1: rgba(88, 76, 220, 0.35);
  --bg-blob-2: rgba(180, 60, 180, 0.22);
  --bg-blob-3: rgba(40, 160, 170, 0.22);

  --text-primary: #f2f3f8;
  --text-secondary: #b7bccc;
  --text-tertiary: #7d8296;

  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-bg-strong: rgba(255, 255, 255, 0.09);
  --glass-bg-soft: rgba(255, 255, 255, 0.035);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-border-soft: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
  --glass-shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.55);
  --glass-highlight: rgba(255, 255, 255, 0.16);

  --accent-1: #8a97ff;
  --accent-2: #c893ff;
  --accent-grad: linear-gradient(135deg, var(--accent-1), var(--accent-2));

  --input-bg: rgba(255, 255, 255, 0.06);
  --danger: #ff6b6f;
  --success: #3ddc97;

  --focus-ring: 0 0 0 3px rgba(138, 151, 255, 0.5);
}

/* -------------------------------------------------------------------------
   2. RESET
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}
ul, ol { padding: 0; list-style: none; }
img, picture, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* -------------------------------------------------------------------------
   3. BASE
   ------------------------------------------------------------------------- */
body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  font-size: var(--fs-body);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--dur-mid) var(--ease), color var(--dur-mid) var(--ease);
}

h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -0.02em; line-height: 1.08; color: var(--text-primary); }
h1 { font-size: var(--fs-h1); font-weight: 600; }
h2 { font-size: var(--fs-h2); font-weight: 600; }
h3 { font-size: var(--fs-h3); font-weight: 600; }
p.lede { font-size: var(--fs-h3); color: var(--text-secondary); font-weight: 400; }

.container {
  width: 100%;
  max-width: var(--content-w);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

main { display: block; padding-top: calc(var(--nav-h) + var(--space-7)); padding-bottom: var(--space-9); }

::selection { background: var(--accent-1); color: #fff; }

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-sm);
}

/* -------------------------------------------------------------------------
   4. ATMOSPHERIC BACKGROUND (signature element)
   ------------------------------------------------------------------------- */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.atmosphere span {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  will-change: transform;
}
.atmosphere span:nth-child(1) {
  width: 42vw; height: 42vw; top: -10%; left: -8%;
  background: var(--bg-blob-1);
  animation: drift1 26s ease-in-out infinite alternate;
}
.atmosphere span:nth-child(2) {
  width: 36vw; height: 36vw; top: 20%; right: -12%;
  background: var(--bg-blob-2);
  animation: drift2 32s ease-in-out infinite alternate;
}
.atmosphere span:nth-child(3) {
  width: 34vw; height: 34vw; bottom: -14%; left: 22%;
  background: var(--bg-blob-3);
  animation: drift3 30s ease-in-out infinite alternate;
}
@keyframes drift1 { from { transform: translate(0,0) scale(1); } to { transform: translate(6vw, 8vh) scale(1.12); } }
@keyframes drift2 { from { transform: translate(0,0) scale(1); } to { transform: translate(-7vw, 5vh) scale(0.9); } }
@keyframes drift3 { from { transform: translate(0,0) scale(1); } to { transform: translate(4vw, -6vh) scale(1.08); } }

/* -------------------------------------------------------------------------
   5. GLASS PRIMITIVES
   ------------------------------------------------------------------------- */

/* Base glass surface — every glass component composes this */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border-soft);
  box-shadow: var(--glass-shadow);
  position: relative;
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass {
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
  }
}
/* Fallback for browsers without backdrop-filter: solid-ish surface so text stays readable */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass { background: var(--glass-bg-strong); }
  [data-theme='dark'] .glass { background: #14151d; }
}

/* Glass Navigation */
.glass-nav {
  background: var(--nav-bg, var(--glass-bg));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  border-radius: var(--r-full);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-nav { backdrop-filter: blur(26px) saturate(180%); -webkit-backdrop-filter: blur(26px) saturate(180%); }
}

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--r-lg);
  box-shadow: var(--glass-shadow);
  transition: transform var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease), background var(--dur-mid) var(--ease);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-card { backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%); }
}
.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, var(--glass-highlight), transparent 40%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.5;
  pointer-events: none;
}

/* Glass Panel — larger section container */
.glass-panel {
  background: var(--glass-bg-soft);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--r-lg);
  box-shadow: var(--glass-shadow);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-panel { backdrop-filter: blur(16px) saturate(150%); -webkit-backdrop-filter: blur(16px) saturate(150%); }
}

/* Glass Button */
.glass-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85em 1.7em;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-small);
  border-radius: var(--r-full);
  border: 1px solid var(--glass-border-soft);
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease), filter var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  box-shadow: var(--glass-shadow);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-btn { backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
}
.glass-btn:hover { filter: brightness(1.06); transform: translateY(-1px); }
.glass-btn:active { transform: translateY(0px) scale(0.98); filter: brightness(0.98); }
.glass-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.glass-btn--primary {
  background: var(--accent-grad);
  color: #fff;
  border: 1px solid transparent;
  box-shadow: 0 10px 26px rgba(91, 110, 245, 0.35);
}
.glass-btn--primary:hover { filter: brightness(1.08); }

.glass-btn--icon {
  padding: 0.6em;
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

/* Glass Input */
.glass-field { display: flex; flex-direction: column; gap: var(--space-2); }
.glass-field label {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--text-secondary);
}
.glass-input, .glass-textarea {
  width: 100%;
  padding: 0.9em 1.1em;
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border-soft);
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: var(--fs-body);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-input, .glass-textarea { backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
}
.glass-textarea { resize: vertical; min-height: 140px; font-family: var(--font-body); }
.glass-input::placeholder, .glass-textarea::placeholder { color: var(--text-tertiary); }
.glass-input:focus, .glass-textarea:focus { border-color: var(--accent-1); box-shadow: var(--focus-ring); }
.glass-input[aria-invalid='true'], .glass-textarea[aria-invalid='true'] { border-color: var(--danger); }
.field-error {
  font-size: var(--fs-micro);
  color: var(--danger);
  min-height: 1.1em;
}

/* Glass Dropdown */
.glass-dropdown { position: relative; }
.glass-dropdown__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.55em 1em;
  border-radius: var(--r-full);
  border: 1px solid var(--glass-border-soft);
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  font-size: var(--fs-small);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--glass-shadow);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-dropdown__trigger { backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
}
.glass-dropdown__trigger svg { transition: transform var(--dur-fast) var(--ease); }
.glass-dropdown[data-open='true'] .glass-dropdown__trigger svg { transform: rotate(180deg); }

.glass-dropdown__menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 160px;
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border-soft);
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  z-index: 60;
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-dropdown__menu { backdrop-filter: blur(24px) saturate(180%); -webkit-backdrop-filter: blur(24px) saturate(180%); }
}
.glass-dropdown[data-open='true'] .glass-dropdown__menu {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.glass-dropdown__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.6em 0.8em;
  border-radius: var(--r-sm);
  font-size: var(--fs-small);
  cursor: pointer;
  color: var(--text-secondary);
}
.glass-dropdown__item:hover { background: rgba(120, 130, 200, 0.12); color: var(--text-primary); }
.glass-dropdown__item[aria-selected='true'] { color: var(--accent-1); font-weight: 700; }

/* Glass Badge / chip */
.glass-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4em 0.9em;
  border-radius: var(--r-full);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-1);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border-soft);
}

/* Glass Modal */
.glass-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 20, 0.35);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-mid) var(--ease);
}
.glass-modal-backdrop[data-open='true'] { opacity: 1; pointer-events: auto; }
.glass-modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -48%) scale(0.97);
  width: min(92vw, 420px);
  border-radius: var(--r-lg);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  padding: var(--space-6);
  z-index: 91;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-mid) var(--ease), transform var(--dur-mid) var(--ease);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-modal { backdrop-filter: blur(30px) saturate(180%); -webkit-backdrop-filter: blur(30px) saturate(180%); }
}
.glass-modal[data-open='true'] { opacity: 1; transform: translate(-50%, -50%) scale(1); pointer-events: auto; }

/* -------------------------------------------------------------------------
   6. NAVIGATION
   ------------------------------------------------------------------------- */
.nav-wrap {
  position: fixed;
  top: var(--space-4);
  left: 0; right: 0;
  z-index: 80;
  display: flex;
  justify-content: center;
  padding-inline: var(--space-4);
}
.glass-nav {
  width: 100%;
  max-width: var(--content-w);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.7rem 0.55rem 1.3rem;
  gap: var(--space-4);
}
.nav-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}
.nav-link {
  position: relative;
  padding: 0.55em 1.1em;
  border-radius: var(--r-full);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav-link:hover { color: var(--text-primary); background: rgba(120,130,200,0.12); }
.nav-link[aria-current='page'] {
  color: #fff;
  background: var(--accent-grad);
}
.nav-actions { display: flex; align-items: center; gap: var(--space-2); }

.nav-toggle {
  display: none;
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: calc(var(--nav-h) + var(--space-5));
  right: var(--space-4);
  left: var(--space-4);
  z-index: 79;
  border-radius: var(--r-lg);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity var(--dur-mid) var(--ease), transform var(--dur-mid) var(--ease);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .mobile-menu { backdrop-filter: blur(28px) saturate(180%); -webkit-backdrop-filter: blur(28px) saturate(180%); }
}
.mobile-menu[data-open='true'] { opacity: 1; transform: translateY(0); pointer-events: auto; }
.mobile-menu a {
  padding: 0.9em 1em;
  border-radius: var(--r-md);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.05rem;
}
.mobile-menu a[aria-current='page'] { background: var(--accent-grad); color: #fff; }
.mobile-menu .mobile-menu__utils {
  display: flex;
  gap: var(--space-2);
  padding-top: var(--space-3);
  margin-top: var(--space-2);
  border-top: 1px solid var(--glass-border-soft);
}

/* Hamburger icon */
.hamburger {
  width: 20px; height: 14px;
  position: relative;
}
.hamburger span {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 6px; }
.hamburger span:nth-child(3) { top: 12px; }
[data-open='true'] .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
[data-open='true'] .hamburger span:nth-child(2) { opacity: 0; }
[data-open='true'] .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* -------------------------------------------------------------------------
   7. HERO (Home)
   ------------------------------------------------------------------------- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-6);
  padding-block: var(--space-8) var(--space-9);
  min-height: calc(100vh - var(--nav-h) - var(--space-8));
  justify-content: center;
}
.hero-avatar {
  width: clamp(96px, 12vw, 140px);
  height: clamp(96px, 12vw, 140px);
  border-radius: 50%;
  padding: 4px;
  background: var(--accent-grad);
  animation: heroIn var(--dur-slow) var(--ease) both;
}
.hero-avatar__inner {
  width: 100%; height: 100%;
  border-radius: 50%;
  background: var(--bg-base);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-avatar__inner svg { width: 100%; height: 100%; }

.hero-name {
  font-size: var(--fs-hero);
  font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: heroIn var(--dur-slow) var(--ease) 80ms both;
}
.hero-sub {
  max-width: 46ch;
  font-size: clamp(1.05rem, 1.2vw + 0.7rem, 1.4rem);
  color: var(--text-secondary);
  animation: heroIn var(--dur-slow) var(--ease) 160ms both;
}
.hero-cta {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
  animation: heroIn var(--dur-slow) var(--ease) 240ms both;
}
@keyframes heroIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* -------------------------------------------------------------------------
   8. SECTIONS / GENERIC PAGE HEADER
   ------------------------------------------------------------------------- */
.page-header {
  text-align: center;
  max-width: 62ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-1);
}
section + section { margin-top: var(--space-8); }

/* -------------------------------------------------------------------------
   9. ABOUT PAGE
   ------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-5);
}
.about-intro { grid-column: span 12; padding: var(--space-6); }
.about-block { grid-column: span 12; padding: var(--space-6); }
@media (min-width: 760px) {
  .about-intro { grid-column: span 12; }
  .about-block--half { grid-column: span 6; }
}
.toolkit-group { margin-bottom: var(--space-5); }
.toolkit-group:last-child { margin-bottom: 0; }
.toolkit-group h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-3);
  font-weight: 600;
}
.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* -------------------------------------------------------------------------
   10. BLOG GRID / CARD
   ------------------------------------------------------------------------- */
.blog-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-7);
}
.filter-chip {
  padding: 0.5em 1.1em;
  border-radius: var(--r-full);
  font-size: var(--fs-small);
  font-weight: 600;
  border: 1px solid var(--glass-border-soft);
  background: var(--glass-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.filter-chip:hover { color: var(--text-primary); }
.filter-chip[aria-pressed='true'] { background: var(--accent-grad); color: #fff; border-color: transparent; }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 980px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .blog-grid { grid-template-columns: 1fr; } }

.blog-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  cursor: pointer;
}
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--glass-shadow-lg); }
.blog-card:hover .blog-card__media svg { transform: scale(1.06); }
.blog-card__media {
  aspect-ratio: 16/10;
  overflow: hidden;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}
.blog-card__media svg { width: 100%; height: 100%; transition: transform var(--dur-slow) var(--ease); }
.blog-card__body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.blog-card__meta { display: flex; align-items: center; gap: var(--space-3); font-size: var(--fs-micro); color: var(--text-tertiary); }
.blog-card__title { font-size: 1.2rem; }
.blog-card__desc { color: var(--text-secondary); font-size: var(--fs-small); flex: 1; }
.blog-card__link {
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--accent-1);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: var(--space-2);
}
.blog-card__link svg { transition: transform var(--dur-fast) var(--ease); width: 14px; height: 14px; }
.blog-card:hover .blog-card__link svg { transform: translateX(3px); }

.empty-state {
  text-align: center;
  padding: var(--space-8);
  color: var(--text-tertiary);
}

/* -------------------------------------------------------------------------
   11. BLOG DETAIL
   ------------------------------------------------------------------------- */
.blog-detail__header { max-width: 74ch; margin-inline: auto; text-align: center; margin-bottom: var(--space-6); }
.blog-detail__meta { display: flex; justify-content: center; gap: var(--space-3); align-items: center; color: var(--text-tertiary); font-size: var(--fs-small); margin-top: var(--space-3); }
.blog-detail__media { max-width: 900px; margin: 0 auto var(--space-7); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--glass-shadow-lg); }
.blog-detail__content {
  max-width: 74ch;
  margin: 0 auto;
  padding: var(--space-7);
  color: var(--text-primary);
}
.blog-detail__content h2 { margin-top: var(--space-6); margin-bottom: var(--space-3); font-size: 1.5rem; }
.blog-detail__content p { color: var(--text-secondary); margin-bottom: var(--space-4); }
.blog-detail__content ul { margin: var(--space-4) 0; padding-left: 1.4em; list-style: disc; color: var(--text-secondary); }
.blog-detail__content li { margin-bottom: var(--space-2); }
.related-heading { max-width: 74ch; margin: var(--space-8) auto var(--space-5); }

/* -------------------------------------------------------------------------
   12. CONTACT
   ------------------------------------------------------------------------- */
.contact-wrap {
  max-width: 640px;
  margin-inline: auto;
  padding: var(--space-7);
}
.contact-form { display: flex; flex-direction: column; gap: var(--space-5); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-status {
  border-radius: var(--r-md);
  padding: var(--space-4);
  font-size: var(--fs-small);
  display: none;
  align-items: center;
  gap: var(--space-2);
}
.form-status[data-state='success'] { display: flex; background: rgba(31,169,113,0.12); color: var(--success); }
.form-status[data-state='error'] { display: flex; background: rgba(229,72,77,0.12); color: var(--danger); }
.spinner {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.5);
  border-top-color: #fff;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* -------------------------------------------------------------------------
   13. FOOTER
   ------------------------------------------------------------------------- */
.site-footer {
  margin-top: var(--space-9);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--glass-border-soft);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-small);
  color: var(--text-tertiary);
}
.footer-links { display: flex; gap: var(--space-5); }
.footer-links a:hover { color: var(--text-primary); }

/* -------------------------------------------------------------------------
   14. UTILITIES
   ------------------------------------------------------------------------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  background: var(--accent-grad);
  color: #fff;
  padding: 0.7em 1.2em;
  border-radius: var(--r-md);
  z-index: 200;
  transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: var(--space-4); }

@media (max-width: 640px) {
  .container { padding-inline: 1.1rem; }
  main { padding-top: calc(var(--nav-h) + var(--space-6)); }
}