/* ==========================================================================
   Behzad Valipour — Personal site
   Custom, dependency-free stylesheet (replaces Bootstrap/AOS template CSS)
   Theme-aware (light + dark), mobile-first, accessible.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Type */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* Fluid type scale */
  --step--1: clamp(0.83rem, 0.79rem + 0.18vw, 0.92rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  --step-1:  clamp(1.2rem, 1.12rem + 0.4vw, 1.4rem);
  --step-2:  clamp(1.45rem, 1.32rem + 0.65vw, 1.85rem);
  --step-3:  clamp(1.8rem, 1.55rem + 1.2vw, 2.6rem);
  --step-4:  clamp(2.4rem, 1.9rem + 2.5vw, 4rem);

  /* Spacing scale (8pt-ish) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --container: 1120px;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --border-w: 1px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 220ms;

  --shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.06);
  --shadow-md: 0 12px 30px -12px rgba(2, 6, 23, 0.18);
  --shadow-lg: 0 30px 60px -25px rgba(2, 6, 23, 0.35);

  color-scheme: dark;
}

/* Dark is the default theme */
:root,
:root[data-theme="dark"] {
  --bg: #0b1120;
  --bg-grid: rgba(148, 163, 184, 0.05);
  --surface: #101a30;
  --surface-2: #16233f;
  --surface-hover: #1a2949;
  --border: rgba(148, 163, 184, 0.16);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text: #e9eef7;
  --text-muted: #9fb0c9;
  --text-dim: #6b7c98;
  --accent: #34d399;
  --accent-2: #22d3ee;
  --on-accent: #04231a;
  --accent-soft: rgba(52, 211, 153, 0.12);
  --accent-ring: rgba(52, 211, 153, 0.45);
  --glow: radial-gradient(60% 60% at 50% 0%, rgba(52, 211, 153, 0.16), transparent 70%);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f9fc;
  --bg-grid: rgba(15, 23, 42, 0.04);
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --surface-hover: #eef2f8;
  --border: rgba(15, 23, 42, 0.10);
  --border-strong: rgba(15, 23, 42, 0.18);
  --text: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --accent: #0f766e;
  --accent-2: #0e7490;
  --on-accent: #ffffff;
  --accent-soft: rgba(15, 118, 110, 0.08);
  --accent-ring: rgba(15, 118, 110, 0.35);
  --glow: radial-gradient(60% 60% at 50% 0%, rgba(15, 118, 110, 0.10), transparent 70%);
  color-scheme: light;
}

/* Follow OS preference when the user hasn't chosen a theme */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg: #f7f9fc;
    --bg-grid: rgba(15, 23, 42, 0.04);
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --surface-hover: #eef2f8;
    --border: rgba(15, 23, 42, 0.10);
    --border-strong: rgba(15, 23, 42, 0.18);
    --text: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;
    --accent: #0f766e;
    --accent-2: #0e7490;
    --on-accent: #ffffff;
    --accent-soft: rgba(15, 118, 110, 0.08);
    --accent-ring: rgba(15, 118, 110, 0.35);
    --glow: radial-gradient(60% 60% at 50% 0%, rgba(15, 118, 110, 0.10), transparent 70%);
    color-scheme: light;
  }
}

/* --------------------------------------------------------------------------
   2. Base / reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

/* Per-section anchor offset overrides.
   Effective landing = html scroll-padding-top (84px) + section scroll-margin-top.
   -50px → these two sections land at ~34px from the top. */
#skills,
#projects {
  scroll-margin-top: -50px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: center top;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
  color: var(--text);
}

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
a:hover { color: var(--text); }

img { max-width: 100%; display: block; }

ul { margin: 0; padding: 0; list-style: none; }

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

:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -60px;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--on-accent);
  padding: 0.6rem 1.2rem;
  border-radius: 0 0 10px 10px;
  font-weight: 600;
  z-index: 1000;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 0; color: var(--on-accent); }

/* --------------------------------------------------------------------------
   3. Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-16) var(--space-24);
  position: relative;
}
.section + .section { padding-top: var(--space-12); }

.section-head { margin-bottom: var(--space-8); max-width: 52ch; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
}
.section-head h2 { font-size: var(--step-3); }
.section-head p { color: var(--text-muted); font-size: var(--step-1); }

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--step-0);
  line-height: 1;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  border: var(--border-w) solid transparent;
  cursor: pointer;
  transition: transform var(--dur) var(--ease),
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
  min-height: 46px;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 8px 24px -10px var(--accent-ring); }
.btn-primary:hover { color: var(--on-accent); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--surface); color: var(--text); transform: translateY(-2px); }

/* --------------------------------------------------------------------------
   5. Header / navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 72px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.brand:hover { color: var(--text); }
.brand .dot { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-links a.active { color: var(--accent); }
.nav-links a.nav-external { display: inline-flex; align-items: center; gap: 0.28rem; }
.nav-links a.nav-external svg { width: 13px; height: 13px; opacity: 0.75; }

/* Projects/Contact aren't linked from the hero, so they stay hidden at the top
   and slide into the nav once you scroll past the hero (JS toggles .revealed). */
.nav-links a.nav-reveal {
  opacity: 0;
  max-width: 0;
  padding-left: 0;
  padding-right: 0;
  overflow: hidden;
  white-space: nowrap;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), max-width var(--dur) var(--ease), padding var(--dur) var(--ease);
}
.nav-links.revealed a.nav-reveal {
  opacity: 1;
  max-width: 8rem;
  padding-left: 0.85rem;
  padding-right: 0.85rem;
  pointer-events: auto;
}

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

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.icon-btn:hover { color: var(--accent); border-color: var(--border-strong); }
.icon-btn svg { width: 20px; height: 20px; }

.theme-toggle .moon { display: none; }
.theme-toggle .sun { display: block; }
:root[data-theme="light"] .theme-toggle .moon { display: block; }
:root[data-theme="light"] .theme-toggle .sun { display: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .theme-toggle .moon { display: block; }
  :root:not([data-theme]) .theme-toggle .sun { display: none; }
}

.nav-toggle { display: none; }

/* Mobile nav */
@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--border);
    padding: var(--space-3) var(--space-6) var(--space-6);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .nav-links.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-links a { padding: 0.9rem 0.5rem; border-bottom: 1px solid var(--border); font-size: 1.05rem; }
  .nav-links a.nav-reveal { display: none; }
  .nav-links.revealed a.nav-reveal { display: block; opacity: 1; max-width: none; padding: 0.9rem 0.5rem; pointer-events: auto; }
  .nav-toggle { display: inline-flex; }
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: calc(72px + var(--space-12));
  padding-bottom: var(--space-16);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--glow);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 940px; }
.hero .status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  margin-bottom: var(--space-4);
}
.status .pulse {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-ring);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--accent-ring); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.hero h1 {
  font-size: var(--step-4);
  margin-bottom: var(--space-4);
}
.hero .role {
  font-size: var(--step-2);
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-4);
  min-height: 1.2em;
}
.hero .role .typed-text { color: var(--accent); }
.hero .role .caret {
  display: inline-block;
  width: 2px; height: 1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: -0.12em;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero .lead {
  font-size: var(--step-0);
  color: var(--text-muted);
  max-width: 62ch;
  margin-bottom: var(--space-6);
}
.hero .lead strong { color: var(--text); font-weight: 600; }

.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-6); }

.socials { display: flex; gap: var(--space-2); }
.socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.socials a:hover { color: var(--accent); transform: translateY(-3px); border-color: var(--border-strong); }
.socials svg { width: 20px; height: 20px; }

/* Metric strip */
/* Featured GitHub repos */
.repos {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}
.repos-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: var(--space-5, 1.25rem);
}

.repo-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.repo-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  height: 100%;
  min-width: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: var(--space-5, 1.25rem);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.repo-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.repo-top { display: flex; align-items: flex-start; gap: 0.55rem; min-width: 0; }
.repo-icon { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 2px; }
.repo-name {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  line-height: 1.35;
  color: var(--text);
  min-width: 0;
  overflow-wrap: anywhere;
}
.repo-card:hover .repo-name { color: var(--accent); }
.repo-desc {
  font-size: var(--step--1);
  line-height: 1.5;
  color: var(--text-muted);
  flex: 1;
}
.repo-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.repo-lang { display: inline-flex; align-items: center; gap: 0.4rem; }
.lang-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--lang, var(--accent));
  flex: none;
}
.repo-stat { display: inline-flex; align-items: center; gap: 0.3rem; }
.repo-stat svg { width: 14px; height: 14px; }
@media (max-width: 720px) { .repo-cards { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   7. About
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-12);
  align-items: start;
}
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; gap: var(--space-8); } }

.portrait {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.portrait img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; }
.portrait::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, color-mix(in srgb, var(--bg) 60%, transparent));
}
.portrait .badge {
  position: absolute;
  left: var(--space-4); bottom: var(--space-4);
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(6px);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
}

.about-body p { color: var(--text-muted); }
.about-body p strong, .about-body p b { color: var(--text); font-weight: 600; }
.about-body .lead-line { font-size: var(--step-1); color: var(--text); font-family: var(--font-display); font-weight: 500; }

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}
@media (max-width: 560px) { .about-highlights { grid-template-columns: 1fr; } }
.about-highlights li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: 0.95rem;
  color: var(--text-muted);
}
.about-highlights svg { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 3px; }

/* --------------------------------------------------------------------------
   8. Skills / tech stack
   -------------------------------------------------------------------------- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
}
.stack-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: var(--space-6);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.stack-card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.stack-card h3 {
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: var(--space-4);
}
.stack-card h3 svg { width: 20px; height: 20px; color: var(--accent); }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.3rem 0.6rem;
  border-radius: 8px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.stack-card:hover .tag { color: var(--text); }

/* --------------------------------------------------------------------------
   9. Experience timeline
   -------------------------------------------------------------------------- */
.timeline { position: relative; display: grid; gap: var(--space-4); }
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(var(--border-strong), transparent);
}
.tl-item {
  position: relative;
  padding-left: var(--space-8);
}
.tl-item::before {
  content: "";
  position: absolute;
  left: 2px; top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
}
.tl-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: var(--space-6);
  transition: border-color var(--dur) var(--ease);
}
.tl-card:hover { border-color: var(--border-strong); }
.tl-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2); align-items: baseline; }
.tl-head h3 { font-size: 1.15rem; margin: 0; }
.tl-org { color: var(--accent); font-weight: 600; }
.tl-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}
.tl-meta { color: var(--text-dim); font-size: 0.85rem; margin: 0.35rem 0 var(--space-3); }
.tl-card p { color: var(--text-muted); margin: 0; font-size: 0.96rem; }
.tl-card ul { margin-top: var(--space-3); display: grid; gap: 0.4rem; }
.tl-card ul li { position: relative; padding-left: 1.2rem; color: var(--text-muted); font-size: 0.94rem; }
.tl-card ul li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }

/* --------------------------------------------------------------------------
   10. Projects
   -------------------------------------------------------------------------- */
.featured {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  margin-bottom: var(--space-8);
}
@media (max-width: 820px) { .featured { grid-template-columns: 1fr; } }
.featured-media {
  position: relative;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.featured-media img {
  width: 100%;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.featured-body { padding: var(--space-8); display: flex; flex-direction: column; justify-content: center; }
.featured-body .kicker {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: var(--space-3);
}
.featured-body h3 { font-size: var(--step-2); }
.featured-body p { color: var(--text-muted); }
.featured-body .tags { margin: var(--space-4) 0 var(--space-6); }
.featured-links { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.text-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-weight: 600; color: var(--accent);
}
.text-link svg { width: 16px; height: 16px; }
.text-link:hover { color: var(--text); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}
.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.project-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.project-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(180deg, var(--surface-2), color-mix(in srgb, var(--surface-2) 60%, var(--surface)));
  border-bottom: 1px solid var(--border);
}
.project-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;      /* whole image visible, never cropped */
  padding: var(--space-4);
  transition: transform 500ms var(--ease);
}
.project-card:hover .project-media img { transform: scale(1.04); }
.project-body { padding: var(--space-6); display: flex; flex-direction: column; flex: 1; }
.project-body h3 { font-size: 1.12rem; margin-bottom: var(--space-2); }
.project-body p { color: var(--text-muted); font-size: 0.92rem; margin-bottom: var(--space-4); }
.project-body .tags { margin-top: auto; margin-bottom: var(--space-4); }
.project-body .project-links { display: flex; flex-wrap: wrap; gap: var(--space-4); }

/* --------------------------------------------------------------------------
   11. Writing / Blog
   -------------------------------------------------------------------------- */
.writing-grid { display: grid; grid-template-columns: 320px 1fr; gap: var(--space-8); align-items: start; }
@media (max-width: 820px) { .writing-grid { grid-template-columns: 1fr; } }
.writing-cta {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: var(--space-8);
  position: sticky; top: 100px;
}
.writing-cta svg.brandmark { width: 34px; height: 34px; color: var(--text); margin-bottom: var(--space-3); }
.writing-cta h3 { font-size: 1.3rem; }
.writing-cta p { color: var(--text-muted); font-size: 0.95rem; }
@media (max-width: 820px) { .writing-cta { position: static; } }

.post-list { display: grid; gap: var(--space-2); }
.post-item a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.post-item a:hover { border-color: var(--accent); transform: translateX(4px); color: var(--text); }
.post-item .post-title { font-weight: 500; }
.post-item .post-date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); white-space: nowrap; }
.post-list .muted { color: var(--text-muted); padding: var(--space-4); font-size: 0.92rem; }

/* --------------------------------------------------------------------------
   12. Contact
   -------------------------------------------------------------------------- */
.contact-card {
  border: 1px solid var(--border);
  background:
    var(--glow),
    var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-16) var(--space-12);
  text-align: center;
}
.contact-card h2 { font-size: var(--step-3); }
.contact-card p { color: var(--text-muted); max-width: 52ch; margin-inline: auto; font-size: var(--step-0); }
.contact-email {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
  margin: var(--space-6) 0;
  color: var(--text);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}
.contact-email:hover { color: var(--accent); }
.contact-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: center; }

/* --------------------------------------------------------------------------
   13. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-8);
  margin-top: var(--space-16);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}
.site-footer p { color: var(--text-dim); font-size: 0.88rem; margin: 0; }
.footer-inner .socials a { width: 40px; height: 40px; }

/* Back to top */
.to-top {
  position: fixed;
  right: 20px; bottom: 20px;
  width: 46px; height: 46px;
  border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: var(--on-accent);
  border: none; cursor: pointer;
  opacity: 0; pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  z-index: 90;
  box-shadow: var(--shadow-md);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top svg { width: 22px; height: 22px; }

/* --------------------------------------------------------------------------
   14. Scroll reveal
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
  will-change: opacity, transform;
}
[data-reveal].in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero .role .caret { animation: none; }
}