/**
 * mehadi.me — design system
 * Dark-first, light-mode capable. 8px spacing grid, fluid type scale,
 * design tokens throughout. No framework dependencies.
 */

/* ------------------------------------------------------------------ */
/* 1. Design tokens                                                    */
/* ------------------------------------------------------------------ */

:root {
  /* Spacing — 8px grid */
  --space-1: 0.5rem;   /*  8px */
  --space-2: 1rem;     /* 16px */
  --space-3: 1.5rem;   /* 24px */
  --space-4: 2rem;     /* 32px */
  --space-5: 3rem;     /* 48px */
  --space-6: 4rem;     /* 64px */
  --space-7: 6rem;     /* 96px */
  --space-8: 8rem;     /* 128px */

  /* Fluid type scale */
  --text-xs:   0.8125rem;
  --text-sm:   0.9375rem;
  --text-base: 1.0625rem;
  --text-lg:   clamp(1.125rem, 1rem + 0.5vw, 1.3125rem);
  --text-xl:   clamp(1.3125rem, 1.1rem + 0.9vw, 1.75rem);
  --text-2xl:  clamp(1.625rem, 1.3rem + 1.4vw, 2.375rem);
  --text-3xl:  clamp(2.125rem, 1.5rem + 2.8vw, 3.5rem);
  --text-hero: clamp(2.375rem, 1.4rem + 4.4vw, 4.5rem);

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'JetBrains Mono', Menlo, Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;

  --container: 72rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.45s;
}

/* Dark (default) */
:root,
:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0b0d12;
  --bg-elevated: #12151d;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #e8eaf0;
  --text-muted: #9aa1b2;
  --text-faint: #6b7284;
  --accent: #8b8ef6;
  --accent-strong: #a5a8ff;
  --accent-contrast: #0b0d12;
  --accent-soft: rgba(139, 142, 246, 0.12);
  --gradient: linear-gradient(120deg, #8b8ef6, #5eead4);
  --nav-bg: rgba(11, 13, 18, 0.78);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-pop: 0 16px 56px rgba(0, 0, 0, 0.5);
  --hero-glow: radial-gradient(ellipse 60% 45% at 50% 0%, rgba(139, 142, 246, 0.14), transparent 70%);
}

:root[data-theme='light'] {
  color-scheme: light;
  --bg: #fafafc;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --border: rgba(15, 18, 34, 0.1);
  --border-strong: rgba(15, 18, 34, 0.2);
  --text: #14161f;
  --text-muted: #4d5464;
  --text-faint: #7b8194;
  --accent: #4f46e5;
  --accent-strong: #4338ca;
  --accent-contrast: #ffffff;
  --accent-soft: rgba(79, 70, 229, 0.09);
  --gradient: linear-gradient(120deg, #4f46e5, #0d9488);
  --nav-bg: rgba(250, 250, 252, 0.82);
  --shadow-card: 0 2px 12px rgba(15, 18, 34, 0.06);
  --shadow-pop: 0 16px 48px rgba(15, 18, 34, 0.14);
  --hero-glow: radial-gradient(ellipse 60% 45% at 50% 0%, rgba(79, 70, 229, 0.08), transparent 70%);
}

/* ------------------------------------------------------------------ */
/* 2. Reset & base                                                     */
/* ------------------------------------------------------------------ */

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

* { margin: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button, input, textarea { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p { text-wrap: pretty; }

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

::selection { background: var(--accent); color: var(--accent-contrast); }

/* Accessible focus */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 200;
  padding: var(--space-1) var(--space-2);
  background: var(--accent);
  color: var(--accent-contrast);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; text-decoration: none; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------------------------------------------ */
/* 3. Layout primitives                                                */
/* ------------------------------------------------------------------ */

.container {
  width: min(var(--container), 100% - var(--space-5));
  margin-inline: auto;
}

.section { padding-block: clamp(var(--space-6), 9vw, var(--space-8)); }

.section-head { max-width: 40rem; margin-bottom: var(--space-6); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: var(--space-2);
}
.eyebrow::before {
  content: '';
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
}

.section-head h2 { font-size: var(--text-2xl); margin-bottom: var(--space-2); }
.section-head .lead { color: var(--text-muted); font-size: var(--text-lg); }

/* ------------------------------------------------------------------ */
/* 4. Buttons                                                          */
/* ------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
              background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn-primary:hover {
  background: var(--accent-strong);
  box-shadow: 0 8px 24px var(--accent-soft), 0 2px 8px rgba(0, 0, 0, 0.2);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }

.btn-sm { padding: 0.5rem 1.125rem; }

/* ------------------------------------------------------------------ */
/* 5. Header / navigation                                              */
/* ------------------------------------------------------------------ */

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.site-header.is-scrolled {
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 4.25rem;
}

.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.03em;
  color: var(--text);
}
.brand:hover { text-decoration: none; color: var(--accent-strong); }
.brand span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin-left: auto;
}
.nav-links a {
  display: block;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a[aria-current='true'] { color: var(--text); background: var(--bg-card-hover); }

.nav-actions { display: flex; align-items: center; gap: var(--space-2); }

.theme-toggle,
.nav-burger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.theme-toggle:hover,
.nav-burger:hover { color: var(--text); border-color: var(--border-strong); }

/* show the icon matching the *other* theme (i.e. what you switch to) */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme='light'] .theme-toggle .icon-sun { display: block; }
:root[data-theme='light'] .theme-toggle .icon-moon { display: none; }

.nav-burger { display: none; }

@media (max-width: 860px) {
  .nav { gap: var(--space-2); }
  .nav-burger { display: inline-flex; }
  .nav-cta { display: none; }
  .nav-links {
    position: fixed;
    top: 4.25rem;
    inset-inline: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) var(--space-3) var(--space-3);
    background: var(--nav-bg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 0.875rem 1rem; font-size: var(--text-base); }
}

/* ------------------------------------------------------------------ */
/* 6. Hero                                                             */
/* ------------------------------------------------------------------ */

.hero {
  position: relative;
  padding-top: clamp(9rem, 18vh, 12rem);
  padding-bottom: var(--space-7);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--hero-glow);
  pointer-events: none;
}
.hero .container { position: relative; }

.availability {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.4375rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-card);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}
.availability .pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
  70%  { box-shadow: 0 0 0 9px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero h1 {
  font-size: var(--text-hero);
  font-weight: 800;
  letter-spacing: -0.035em;
  max-width: 17ch;
  margin-bottom: var(--space-3);
}
.hero h1 .accent {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .subhead {
  max-width: 44rem;
  font-size: var(--text-lg);
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}
.hero .subhead strong { color: var(--text); font-weight: 600; }

.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-6); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: var(--space-5);
  justify-content: start;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}
.hero-stats .stat .value {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.hero-stats .stat .label {
  font-size: var(--text-xs);
  color: var(--text-faint);
  max-width: 12rem;
}
@media (max-width: 640px) {
  .hero-stats { grid-template-columns: 1fr; gap: var(--space-2); }
  .hero-stats .stat { display: flex; align-items: baseline; gap: var(--space-2); }
}

/* Tech strip */
.tech-strip {
  padding-block: var(--space-3);
  border-block: 1px solid var(--border);
  background: var(--bg-card);
}
.tech-strip ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  justify-content: center;
  list-style: none;
  padding: 0;
}
.tech-strip li {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--text-faint);
  text-transform: uppercase;
}

/* ------------------------------------------------------------------ */
/* 7. Cards & grids                                                    */
/* ------------------------------------------------------------------ */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease),
              transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.card:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: var(--space-3);
}
.service-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem; height: 3rem;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  color: var(--accent-strong);
  margin-bottom: var(--space-3);
}
.service-card h3 { font-size: var(--text-lg); margin-bottom: var(--space-1); }
.service-card p { color: var(--text-muted); font-size: var(--text-sm); }

/* ------------------------------------------------------------------ */
/* 8. Work / projects                                                  */
/* ------------------------------------------------------------------ */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-5);
}
.filter-bar button {
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.filter-bar button:hover { color: var(--text); border-color: var(--border-strong); }
.filter-bar button[aria-pressed='true'] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(22rem, 100%), 1fr));
  gap: var(--space-3);
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
  cursor: pointer;
}
.project-card.is-hidden { display: none; }

.project-card .thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.project-card .thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.project-card:hover .thumb img { transform: scale(1.04); }

.project-card .body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-2);
  padding: var(--space-3);
}
.project-card .cat {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-strong);
}
.project-card h3 { font-size: var(--text-lg); }
.project-card .tagline { color: var(--text-muted); font-size: var(--text-sm); flex: 1; }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.chip {
  padding: 0.1875rem 0.625rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.71875rem;
  color: var(--text-faint);
  white-space: nowrap;
}

.project-card .open-case {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: none;
  border: none;
  padding: 0;
  color: var(--accent-strong);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
}
.project-card .open-case svg { transition: transform 0.2s var(--ease); }
.project-card:hover .open-case svg { transform: translateX(4px); }

/* Case-study dialog */
.case-dialog {
  width: min(52rem, calc(100% - 2rem));
  max-height: calc(100dvh - 4rem);
  margin: auto;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: var(--shadow-pop);
}
.case-dialog::backdrop {
  background: rgba(4, 5, 8, 0.7);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.case-dialog .dialog-inner { padding: clamp(var(--space-3), 4vw, var(--space-5)); }
.case-dialog .dialog-close {
  position: sticky;
  top: var(--space-2);
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-muted);
  cursor: pointer;
  z-index: 2;
  float: right;
}
.case-dialog .dialog-close:hover { color: var(--text); border-color: var(--border-strong); }

.case-dialog img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-block: var(--space-3);
}
.case-dialog .cat { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-strong); }
.case-dialog h3 { font-size: var(--text-xl); margin-top: var(--space-1); }

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-block: var(--space-3);
}
.case-metrics .metric {
  padding: var(--space-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  text-align: center;
}
.case-metrics .value { font-weight: 800; font-size: var(--text-lg); letter-spacing: -0.02em; }
.case-metrics .label { font-size: var(--text-xs); color: var(--text-faint); }
@media (max-width: 560px) { .case-metrics { grid-template-columns: 1fr; } }

.case-dialog h4 {
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-strong);
  margin: var(--space-4) 0 var(--space-1);
}
.case-dialog p, .case-dialog li { color: var(--text-muted); }
.case-dialog ul { padding-left: 1.25rem; display: grid; gap: 0.375rem; }
.case-dialog .chip-row { margin-top: var(--space-1); }

/* ------------------------------------------------------------------ */
/* 9. About / skills / experience                                      */
/* ------------------------------------------------------------------ */

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-6);
  align-items: start;
}
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; gap: var(--space-4); } }

.about-copy .lead-line { font-size: var(--text-xl); font-weight: 700; letter-spacing: -0.02em; margin-bottom: var(--space-3); }
.about-copy p { color: var(--text-muted); margin-bottom: var(--space-2); }

.about-highlights { display: grid; gap: var(--space-2); list-style: none; padding: 0; }
.about-highlights li {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  font-size: var(--text-sm);
}
.about-highlights svg { flex-shrink: 0; color: var(--accent-strong); margin-top: 0.2em; }

.oss-links { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-top: var(--space-2); }
a.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  font-size: var(--text-xs);
  transition: color 0.2s, border-color 0.2s;
}
a.chip-link:hover { color: var(--accent-strong); border-color: var(--accent); text-decoration: none; }

.skills-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: var(--space-3); }
.skills-group h3 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: var(--space-2);
}
.skills-group .chip { font-size: var(--text-xs); color: var(--text-muted); padding: 0.375rem 0.875rem; }

/* Experience timeline */
.xp-grid { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: var(--space-6); }
@media (max-width: 860px) { .xp-grid { grid-template-columns: 1fr; } }

.timeline { list-style: none; padding: 0; position: relative; display: grid; gap: var(--space-4); }
.timeline::before {
  content: '';
  position: absolute;
  left: 0.4375rem;
  top: 0.5rem; bottom: 0.5rem;
  width: 1px;
  background: var(--border);
}
.timeline li { position: relative; padding-left: var(--space-4); }
.timeline li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.4375rem;
  width: 15px; height: 15px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
}
.timeline .duration { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-faint); }
.timeline h3, .timeline h4 { font-size: var(--text-base); margin-top: 0.25rem; }
.timeline .org { color: var(--accent-strong); font-size: var(--text-sm); font-weight: 500; }
.timeline p { color: var(--text-muted); font-size: var(--text-sm); margin-top: var(--space-1); }

.xp-side h3 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: var(--space-2);
}

/* ------------------------------------------------------------------ */
/* 10. FAQ                                                             */
/* ------------------------------------------------------------------ */

.faq-list { display: grid; gap: var(--space-2); max-width: 46rem; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  transition: border-color 0.2s;
}
.faq-item[open] { border-color: var(--border-strong); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev { flex-shrink: 0; transition: transform 0.25s var(--ease); color: var(--text-faint); }
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item .answer { padding: 0 var(--space-3) var(--space-3); color: var(--text-muted); font-size: var(--text-sm); }

/* ------------------------------------------------------------------ */
/* 11. Contact                                                         */
/* ------------------------------------------------------------------ */

.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-6); align-items: start; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: var(--space-4); } }

.contact-info h2 { font-size: var(--text-2xl); margin-bottom: var(--space-2); }
.contact-info .lead { color: var(--text-muted); margin-bottom: var(--space-4); }

.contact-facts { list-style: none; padding: 0; display: grid; gap: var(--space-2); }
.contact-facts li { display: flex; align-items: center; gap: var(--space-2); color: var(--text-muted); font-size: var(--text-sm); }
.contact-facts svg { color: var(--accent-strong); flex-shrink: 0; }
.contact-facts a { color: var(--text); font-weight: 500; }

.socials { display: flex; gap: var(--space-1); margin-top: var(--space-4); }
.socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem; height: 2.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all 0.2s var(--ease);
}
.socials a:hover { color: var(--accent-strong); border-color: var(--accent); transform: translateY(-2px); }

.contact-form { display: grid; gap: var(--space-2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

.field { display: grid; gap: 0.375rem; }
.field label { font-size: var(--text-sm); font-weight: 500; }
.field input,
.field textarea {
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-faint); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field textarea { min-height: 9rem; resize: vertical; }

.form-status { font-size: var(--text-sm); min-height: 1.5rem; }
.form-status.is-success { color: #34d399; }
.form-status.is-error { color: #f87171; }

/* ------------------------------------------------------------------ */
/* 12. Footer                                                          */
/* ------------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-5);
  background: var(--bg-card);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.footer-nav { display: flex; flex-wrap: wrap; gap: var(--space-3); list-style: none; padding: 0; }
.footer-nav a { color: var(--text-muted); font-size: var(--text-sm); }
.footer-nav a:hover { color: var(--text); }
.footer-meta { width: 100%; display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2); margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--border); color: var(--text-faint); font-size: var(--text-xs); }

/* ------------------------------------------------------------------ */
/* 13. Reveal animations (JS adds .reveal; IO adds .is-visible)        */
/* ------------------------------------------------------------------ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}