/* ============================================================
   OMER KURT - PORTFOLIO STYLESHEET
   Clean Paper — Editorial Precision meets Warm Engineering
   Light & Dark Theme with Toggle
   ============================================================ */

/* --- Theme: Light (Default) --- */
:root {
  --bg-primary: #faf9f6;
  --bg-secondary: #f2f0ea;
  --bg-card: #ffffff;
  --bg-card-hover: #fefdfb;
  --bg-elevated: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #52526a;
  --text-muted: #8a8a9a;
  --accent: #a06820;
  --accent-hover: #8a5a18;
  --accent-dim: rgba(160, 104, 32, 0.07);
  --accent-secondary: #4a7a52;
  --accent-teal: #3a7a77;
  --accent-rose: #9a5252;
  --accent-purple: #8264aa;
  --accent-orange: #c46a28;
  --accent-green: #1a9a6a;
  --border: rgba(26, 26, 46, 0.08);
  --border-hover: rgba(160, 104, 32, 0.22);
  --border-active: rgba(160, 104, 32, 0.35);
  --radius: 6px;
  --radius-lg: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --transition: 0.2s ease;
  --font-display: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  --font-body: 'Figtree', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', 'Courier New', monospace;
  --nav-bg: rgba(250, 249, 246, 0.88);
  --nav-border: rgba(26, 26, 46, 0.06);
  --mobile-menu-bg: rgba(250, 249, 246, 0.97);
  --hero-grid-color: rgba(26, 26, 46, 0.04);
  --modal-overlay-bg: rgba(250, 249, 246, 0.85);
  --icon-filter: none;
}

/* --- Theme: Dark --- */
[data-theme="dark"] {
  --bg-primary: #121118;
  --bg-secondary: #16141e;
  --bg-card: #1b1924;
  --bg-card-hover: #211f2c;
  --bg-elevated: #24222f;
  --text-primary: #e8e2d6;
  --text-secondary: #9e998e;
  --text-muted: #6a665e;
  --accent: #c4873a;
  --accent-hover: #d4973a;
  --accent-dim: rgba(196, 135, 58, 0.10);
  --accent-secondary: #6b8f71;
  --accent-teal: #5a8a87;
  --accent-rose: #b86b6b;
  --accent-purple: #9482b4;
  --accent-orange: #fb923c;
  --accent-green: #34d399;
  --border: rgba(232, 226, 214, 0.07);
  --border-hover: rgba(196, 135, 58, 0.30);
  --border-active: rgba(196, 135, 58, 0.50);
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.15);
  --shadow: 0 4px 20px rgba(0,0,0,0.2);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.35);
  --nav-bg: rgba(18, 17, 24, 0.9);
  --nav-border: rgba(232, 226, 214, 0.05);
  --mobile-menu-bg: rgba(18, 17, 24, 0.97);
  --hero-grid-color: rgba(232, 226, 214, 0.025);
  --modal-overlay-bg: rgba(10, 9, 14, 0.8);
  --icon-filter: grayscale(30%) brightness(0.9);
}

/* --- Theme Transition --- */
html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
  transition: background-color 0.4s ease,
              color 0.3s ease,
              border-color 0.3s ease,
              box-shadow 0.3s ease !important;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; }

/* --- Typography --- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.2; }

/* --- Layout --- */
.container { max-width: 1120px; margin: 0 auto; padding: 0 32px; }
.section { padding: 110px 0; position: relative; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2.5px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 120px;
}

.section-title {
  font-size: 2.4rem;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 52px;
  line-height: 1.7;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 32px;
  transition: all 0.3s ease;
}
.nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}
[data-theme="dark"] .nav.scrolled {
  box-shadow: none;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 8px 12px;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 12px;
  right: 12px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }
.nav-links a.active::after,
.nav-links a:hover::after { transform: scaleX(1); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  transition: var(--transition);
}

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  position: relative;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--border-hover);
  background: var(--accent-dim);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.theme-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease, opacity 0.2s ease;
}
.theme-toggle:hover svg {
  transform: rotate(15deg);
}

/* Light mode: show moon, hide sun */
.icon-sun { display: none; }
.icon-moon { display: block; }
/* Dark mode: show sun, hide moon */
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* Subtle engineering grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--hero-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--hero-grid-color) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at 40% 40%, black 10%, transparent 60%);
  -webkit-mask-image: radial-gradient(ellipse at 40% 40%, black 10%, transparent 60%);
  pointer-events: none;
}

/* Grain texture */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.02'/%3E%3C/svg%3E");
  background-size: 256px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.5;
}
[data-theme="dark"] .hero::after {
  opacity: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 28px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--bg-card);
}
[data-theme="dark"] .hero-badge {
  background: transparent;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  animation: pulse 2.5s infinite;
}

.hero-name {
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 600;
  line-height: 1.05;
  margin-bottom: 22px;
  letter-spacing: -1.5px;
}
.hero-name .accent {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.hero-title {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
  max-width: 600px;
}

.hero-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 560px;
  margin-bottom: 44px;
}

.hero-stats {
  display: flex;
  gap: 0;
  margin-bottom: 44px;
}
.hero-stats > div {
  padding: 0 28px;
  border-right: 1px solid var(--border);
}
.hero-stats > div:first-child { padding-left: 0; }
.hero-stats > div:last-child { border-right: none; }

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 6px;
}
.hero-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-actions { display: flex; gap: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--accent);
  color: #ffffff;
}
[data-theme="dark"] .btn-primary {
  color: #121118;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(160, 104, 32, 0.25);
}
[data-theme="dark"] .btn-primary:hover {
  color: #121118;
  box-shadow: 0 4px 16px rgba(196, 135, 58, 0.25);
}
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--accent-dim);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 2;
}
.hero-scroll span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-muted);
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 40%;
  background: var(--accent);
  animation: scrollDown 2s ease-in-out infinite;
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 64px;
  align-items: start;
}
.about-text p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.highlight-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
.highlight-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.highlight-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}
.highlight-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --- Skills --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.skill-category {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
.skill-category:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.skill-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.skill-category-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
}
.skill-category-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-primary);
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: all var(--transition);
  background: var(--bg-primary);
}
[data-theme="dark"] .skill-tag {
  background: transparent;
}
.skill-tag:hover {
  color: var(--accent);
  border-color: var(--border-hover);
  background: var(--accent-dim);
}

/* --- Projects --- */
.projects-filter {
  display: flex;
  gap: 4px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  background: none;
  border: none;
  padding: 10px 16px;
  cursor: pointer;
  transition: color var(--transition);
  position: relative;
  white-space: nowrap;
}
.filter-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}
.filter-btn:hover { color: var(--text-secondary); }
.filter-btn.active { color: var(--text-primary); }
.filter-btn.active::after { transform: scaleX(1); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  outline: none;
  box-shadow: var(--shadow-sm);
}
.project-card:hover,
.project-card:focus-visible {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
[data-theme="dark"] .project-card {
  box-shadow: none;
}
[data-theme="dark"] .project-card:hover,
[data-theme="dark"] .project-card:focus-visible {
  box-shadow: var(--shadow);
  background: var(--bg-card-hover);
}

.project-card-screenshot { display: none; }

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.project-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent) !important;
  background: var(--accent-dim) !important;
  border: 1px solid var(--border-hover);
  flex-shrink: 0;
  overflow: hidden;
}
.project-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: var(--icon-filter);
}

.project-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 3px 8px;
  border-radius: 4px;
}
.badge-flagship {
  background: rgba(160, 104, 32, 0.08);
  border: 1px solid rgba(160, 104, 32, 0.20);
  color: var(--accent);
}
.badge-engine {
  background: rgba(58, 122, 119, 0.08);
  border: 1px solid rgba(58, 122, 119, 0.20);
  color: var(--accent-teal);
}
.badge-utility {
  background: rgba(74, 122, 82, 0.08);
  border: 1px solid rgba(74, 122, 82, 0.20);
  color: var(--accent-secondary);
}
.badge-data {
  background: rgba(130, 100, 170, 0.08);
  border: 1px solid rgba(130, 100, 170, 0.20);
  color: var(--accent-purple);
}
.badge-integration {
  background: rgba(154, 82, 82, 0.08);
  border: 1px solid rgba(154, 82, 82, 0.20);
  color: var(--accent-rose);
}
[data-theme="dark"] .badge-flagship {
  background: rgba(196, 135, 58, 0.08);
  border-color: rgba(196, 135, 58, 0.25);
}
[data-theme="dark"] .badge-engine {
  background: rgba(90, 138, 135, 0.08);
  border-color: rgba(90, 138, 135, 0.25);
}
[data-theme="dark"] .badge-utility {
  background: rgba(107, 143, 113, 0.08);
  border-color: rgba(107, 143, 113, 0.25);
}
[data-theme="dark"] .badge-data {
  background: rgba(148, 130, 180, 0.08);
  border-color: rgba(148, 130, 180, 0.25);
  color: var(--accent-purple);
}
[data-theme="dark"] .badge-integration {
  background: rgba(184, 107, 107, 0.08);
  border-color: rgba(184, 107, 107, 0.25);
}

.project-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.project-version {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.project-tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-features {
  list-style: none;
  margin-bottom: 16px;
}
.project-features li {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 3px 0 3px 16px;
  position: relative;
  line-height: 1.5;
}
.project-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 16px;
}
.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.project-loc {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}
.project-expand {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  opacity: 0.5;
  transition: opacity var(--transition);
}
.project-card:hover .project-expand { opacity: 1; }

/* --- Experience --- */
.timeline { max-width: 680px; position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  padding-left: 32px;
  margin-bottom: 48px;
  position: relative;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -4px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.timeline-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.timeline-company {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.timeline-desc {
  list-style: none;
}
.timeline-desc li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 5px 0 5px 16px;
  position: relative;
  line-height: 1.65;
}
.timeline-desc li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 4px;
  height: 1px;
  background: var(--text-muted);
  opacity: 0.4;
}

/* --- Education --- */
.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.education-card {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
.education-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
[data-theme="dark"] .education-card {
  box-shadow: none;
}
.education-degree {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}
.education-school {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.education-field {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}
.education-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.education-detail {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* --- Contact --- */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 32px;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .contact-link {
  background: transparent;
  box-shadow: none;
}
.contact-link svg {
  width: 16px;
  height: 16px;
  opacity: 0.5;
  transition: opacity var(--transition);
}
.contact-link:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.contact-link:hover svg { opacity: 0.8; }

/* --- Footer --- */
.footer {
  padding: 36px 0;
  border-top: 1px solid var(--border);
}
.footer-text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.5px;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--modal-overlay-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 92%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.25s ease;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal { transform: translateY(0); }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 28px 32px 0;
  position: sticky;
  top: 0;
  background: var(--bg-card);
  z-index: 1;
  padding-bottom: 16px;
}
.modal-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text-primary);
}
.modal-version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}
.modal-close:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--accent-dim);
}

.modal-body {
  padding: 8px 32px 32px;
}

.modal-screenshot {
  margin-bottom: 24px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
[data-theme="dark"] .modal-screenshot {
  background: #0d0c12;
}
.modal-screenshot img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  display: block;
  cursor: pointer;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.modal-section-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
  margin-top: 28px;
}

.modal-features {
  list-style: none;
}
.modal-features li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: 5px 0 5px 18px;
  position: relative;
  line-height: 1.6;
}
.modal-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.modal-tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.modal-tech-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.modal-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.modal-stat { text-align: center; }
.modal-stat-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.modal-stat-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --- Animations --- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes scrollDown {
  0% { top: -40%; }
  100% { top: 110%; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 76px 0; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--mobile-menu-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle { display: flex; }

  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero-name { letter-spacing: 0; }
  .hero-title { font-size: 1rem; }
  .hero-desc { margin-bottom: 32px; }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px 16px;
    margin-bottom: 32px;
  }
  .hero-stats > div {
    border-right: none;
    padding: 0;
  }
  .hero-scroll { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-highlights { grid-template-columns: 1fr 1fr; }

  .skills-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .projects-filter { overflow-x: auto; }

  .modal { margin: 12px; }
  .modal-header { padding: 24px 20px 12px; }
  .modal-body { padding: 8px 20px 24px; }
  .education-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { justify-content: center; }
}

@media (max-width: 480px) {
  .hero { padding: 90px 0 48px; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 16px 10px; }
  .hero-stat-value { font-size: 1.3rem; }
  .hero-stat-label { font-size: 0.6rem; }
  .about-highlights { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; align-items: center; }
  .section-title { font-size: 1.8rem; }
}