/* ============================================================
   Nicholas Otieno — Portfolio
   Design: Dark, minimal, Stripe/Linear/Vercel-inspired
   ============================================================ */

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

:root {
  /* ── Dark theme (default) ── */
  color-scheme: dark;
  --bg:            #0a0a0f;
  --bg-alt:        #0f0f18;
  --surface:       #13131f;
  --surface-hover: #1a1a2e;
  --border:        rgba(255,255,255,0.07);
  --border-hover:  rgba(255,255,255,0.14);
  --text-primary:  #f0f0f5;
  --text-secondary:#8b8ba8;
  --text-muted:    #55556a;
  --accent:        #7c6bff;
  --accent-light:  #a99dff;
  --accent-glow:   rgba(224,112,48,0.25);
  --grad:          linear-gradient(135deg, #7c6bff 0%, #c084fc 100%);
  --radius:        12px;
  --radius-lg:     20px;
  --shadow:        0 1px 3px rgba(0,0,0,0.4), 0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover:  0 2px 8px rgba(0,0,0,0.5), 0 16px 48px rgba(224,112,48,0.15);
  --font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
  --max-w:         1140px;
  --nav-h:         64px;
  --nav-bg:        rgba(10,10,15,0.75);
  --nav-bg-scrolled: rgba(10,10,15,0.92);
  --nav-mobile-bg: rgba(10,10,15,0.97);
  --inset-bg:      rgba(0,0,0,0.2);
}

/* ── Light theme via system preference ─────────────────── */
@media (prefers-color-scheme: light) {
  html:not([data-theme="dark"]) {
    color-scheme: light;
    --bg:            #fdf8f3;
    --bg-alt:        #f5ece0;
    --surface:       #ffffff;
    --surface-hover: #fdf2e8;
    --border:        rgba(0,0,0,0.08);
    --border-hover:  rgba(0,0,0,0.16);
    --text-primary:  #1a0e06;
    --text-secondary:#6b4c2e;
    --text-muted:    #9b7a58;
    --accent:        #C85E18;
    --accent-light:  #E07030;
    --accent-glow:   rgba(200,94,24,0.15);
    --grad:          linear-gradient(135deg, #C85E18 0%, #E8903A 100%);
    --shadow:        0 1px 3px rgba(0,0,0,0.08), 0 4px 24px rgba(0,0,0,0.06);
    --shadow-hover:  0 2px 8px rgba(0,0,0,0.12), 0 16px 48px rgba(200,94,24,0.12);
    --nav-bg:        rgba(253,248,243,0.80);
    --nav-bg-scrolled: rgba(253,248,243,0.95);
    --nav-mobile-bg: rgba(253,248,243,0.98);
    --inset-bg:      rgba(0,0,0,0.04);
  }
}

/* ── Forced light theme ─────────────────────────────────── */
html[data-theme="light"] {
  color-scheme: light;
  --bg:            #fdf8f3;
  --bg-alt:        #f5ece0;
  --surface:       #ffffff;
  --surface-hover: #fdf2e8;
  --border:        rgba(0,0,0,0.08);
  --border-hover:  rgba(0,0,0,0.16);
  --text-primary:  #1a0e06;
  --text-secondary:#6b4c2e;
  --text-muted:    #9b7a58;
  --accent:        #C85E18;
  --accent-light:  #E07030;
  --accent-glow:   rgba(200,94,24,0.15);
  --grad:          linear-gradient(135deg, #C85E18 0%, #E8903A 100%);
  --shadow:        0 1px 3px rgba(0,0,0,0.08), 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover:  0 2px 8px rgba(0,0,0,0.12), 0 16px 48px rgba(200,94,24,0.12);
  --nav-bg:        rgba(253,248,243,0.80);
  --nav-bg-scrolled: rgba(253,248,243,0.95);
  --nav-mobile-bg: rgba(253,248,243,0.98);
  --inset-bg:      rgba(0,0,0,0.04);
}

/* ── Forced dark theme ─────────────────────────────────── */
html[data-theme="dark"] {
  color-scheme: dark;
  --bg:            #0d0a07;
  --bg-alt:        #130e09;
  --surface:       #1c1409;
  --surface-hover: #241b0c;
  --border:        rgba(255,255,255,0.07);
  --border-hover:  rgba(255,255,255,0.14);
  --text-primary:  #f5f0ea;
  --text-secondary:#9b8a74;
  --text-muted:    #5a4e40;
  --accent:        #E07030;
  --accent-light:  #F59050;
  --accent-glow:   rgba(224,112,48,0.25);
  --grad:          linear-gradient(135deg, #D96820 0%, #F5A050 100%);
  --shadow:        0 1px 3px rgba(0,0,0,0.4), 0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover:  0 2px 8px rgba(0,0,0,0.5), 0 16px 48px rgba(224,112,48,0.15);
  --nav-bg:        rgba(13,10,7,0.75);
  --nav-bg-scrolled: rgba(13,10,7,0.92);
  --nav-mobile-bg: rgba(13,10,7,0.97);
  --inset-bg:      rgba(0,0,0,0.25);
}

html { scroll-behavior: smooth; font-size: 16px; }
html, body { transition: background-color 0.3s ease, color 0.3s ease; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* Gradient text */
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Layout helpers */
.section { padding: 100px 24px; }
.section-alt { background: var(--bg-alt); }
.section-container { max-width: var(--max-w); margin: 0 auto; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}
.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-primary:hover {
  opacity: 0.88;
  box-shadow: 0 0 32px rgba(224,112,48,0.4);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}
.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  color: var(--accent-light);
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--surface);
  color: var(--text-primary);
  border-color: var(--border-hover);
}
.btn-full { width: 100%; justify-content: center; }

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* Navigation */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
#navbar.scrolled {
  border-bottom-color: var(--border);
  background: var(--nav-bg-scrolled);
}
.nav-container {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-logo {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.logo-bracket { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}
.nav-links a {
  padding: 0.4rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover { color: var(--text-primary); background: var(--surface); }
.nav-github {
  color: var(--text-primary) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  margin-left: 0.5rem;
}
.nav-github:hover { border-color: var(--accent) !important; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Theme toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  flex-shrink: 0;
  margin-left: 0.25rem;
}
.theme-toggle:hover {
  color: var(--accent-light);
  border-color: var(--accent);
  background: var(--surface-hover);
}

/* Hero */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-h) + 80px) 24px 80px;
  text-align: center;
  overflow: hidden;
}
#hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(224,112,48,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(224,112,48,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
  pointer-events: none;
}
#hero::before {
  content: '';
  position: absolute;
  top: 30%; left: 25%;
  transform: translateX(-50%);
  width: 500px; height: 400px;
  background: radial-gradient(ellipse, rgba(224,112,48,0.10) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(60px);
}
.hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
  max-width: var(--max-w);
  width: 100%;
  padding: 0 24px;
}
.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  text-align: left;
}
/* Photo column */
.hero-photo {
  flex-shrink: 0;
}
.hero-photo-frame {
  position: relative;
  width: 340px;
  aspect-ratio: 3/4;
  border-radius: 24px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(224,112,48,0.25),
    0 0 60px rgba(224,112,48,0.18),
    0 24px 80px rgba(0,0,0,0.5);
}
.hero-photo-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(224,112,48,0.12) 0%, transparent 50%);
  z-index: 1;
  pointer-events: none;
}
.hero-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.95rem;
  background: rgba(224,112,48,0.1);
  border: 1px solid rgba(224,112,48,0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 500;
}
.badge-dot {
  width: 7px; height: 7px;
  background: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(74,222,128,0.8);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 6px rgba(74,222,128,0.8); }
  50% { box-shadow: 0 0 14px rgba(74,222,128,0.4); }
}
.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}
.hero-desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
}
.hero-desc strong { color: var(--text-primary); }
.hero-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-start;
}
.hero-stack {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: flex-start;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.hero-stack .dot { color: var(--border-hover); }
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bob 2.5s ease infinite;
}
@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about-text h2 { margin-bottom: 1.5rem; }
.about-text p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 1.25rem; }
.about-text p strong { color: var(--text-primary); }
.about-links { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.about-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: all 0.2s ease;
}
.about-link:hover { color: var(--accent-light); border-color: var(--accent); background: rgba(224,112,48,0.06); }
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.about-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: border-color 0.25s ease;
}
.about-stat-card:hover { border-color: var(--accent); }
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.stat-label { font-size: 0.875rem; color: var(--text-secondary); }
.stat-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }
.about-focus-card {
  grid-column: span 2;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.focus-item { display: flex; align-items: center; gap: 0.6rem; font-size: 0.875rem; color: var(--text-secondary); }
.focus-item i { color: var(--accent); font-size: 0.9rem; }

/* Experience Timeline */
.timeline { position: relative; padding-left: 28px; margin-bottom: 4rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}
.timeline-item { position: relative; margin-bottom: 2rem; }
.timeline-marker {
  position: absolute;
  left: -34px; top: 24px;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--bg-alt), 0 0 12px var(--accent-glow);
}
.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.timeline-header h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.2rem; }
.timeline-company { font-size: 0.875rem; color: var(--accent-light); font-weight: 500; }
.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  background: var(--surface-hover);
  border-radius: 4px;
  white-space: nowrap;
}
.timeline-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  background: rgba(224,112,48,0.1);
  color: var(--accent-light);
  border: 1px solid rgba(224,112,48,0.2);
  border-radius: 4px;
}
.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.35rem 0 0.35rem 1rem;
  position: relative;
  line-height: 1.6;
}
.timeline-bullets li::before { content: '\203A'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Education */
.edu-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.edu-card { display: flex; align-items: flex-start; gap: 1rem; }
.edu-icon {
  width: 40px; height: 40px;
  background: rgba(224,112,48,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.edu-card h4 { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.2rem; }
.edu-card p { font-size: 0.85rem; color: var(--text-secondary); }
.edu-card span { font-size: 0.775rem; color: var(--text-muted); font-family: var(--font-mono); }

/* Projects */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1.25rem; }
.project-card { display: flex; flex-direction: column; gap: 1rem; }
.project-card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--surface) 0%, rgba(224,112,48,0.06) 100%);
  border-color: rgba(224,112,48,0.2);
}
.project-card:hover { border-color: rgba(224,112,48,0.3); }
.project-card-header { display: flex; align-items: center; justify-content: space-between; }
.project-icon {
  width: 44px; height: 44px;
  background: rgba(224,112,48,0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
}
.project-links { display: flex; align-items: center; gap: 0.5rem; }
.project-links a { font-size: 1.1rem; color: var(--text-muted); transition: color 0.2s ease; }
.project-links a:hover { color: var(--accent-light); }
.project-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid rgba(224,112,48,0.3);
  border-radius: 100px;
  color: var(--accent-light);
}
.project-card h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); }
.project-problem, .project-solution { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.65; }
.project-problem strong, .project-solution strong { color: var(--text-primary); }
.project-arch {
  background: var(--inset-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}
.arch-label {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.6rem;
}
.project-arch li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 0.2rem 0 0.2rem 1rem;
  position: relative;
  line-height: 1.5;
}
.project-arch li::before { content: '\2013'; position: absolute; left: 0; color: var(--text-muted); }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; }
.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  background: var(--surface-hover);
  color: var(--text-muted);
  border-radius: 4px;
}

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.skill-group-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.25rem; }
.skill-group-icon {
  width: 36px; height: 36px;
  background: rgba(224,112,48,0.12);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 0.9rem;
}
.skill-group h3 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.skill-pills { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-pill {
  font-size: 0.825rem;
  padding: 0.35rem 0.75rem;
  background: var(--surface-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 100px;
  transition: all 0.2s ease;
  cursor: default;
}
.skill-pill:hover {
  background: rgba(224,112,48,0.1);
  color: var(--accent-light);
  border-color: rgba(224,112,48,0.3);
}

/* GitHub CTA */
.github-cta {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--surface) 0%, rgba(224,112,48,0.06) 100%);
  border-color: rgba(224,112,48,0.2);
}
.github-cta-icon { font-size: 3rem; color: var(--text-secondary); flex-shrink: 0; }
.github-cta-text { flex: 1; min-width: 260px; }
.github-cta-text h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.6rem; }
.github-cta-text p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* Testimonials */
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.testimonial-card { display: flex; flex-direction: column; gap: 1rem; }
.testimonial-quote { color: var(--accent); font-size: 1.5rem; opacity: 0.6; }
.testimonial-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.75; font-style: italic; flex: 1; }
.testimonial-author { display: flex; align-items: center; gap: 0.75rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.testimonial-author img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); }
.testimonial-author strong { display: block; font-size: 0.875rem; color: var(--text-primary); }
.testimonial-author span { font-size: 0.78rem; color: var(--text-muted); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 2rem; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 0.75rem; }
.contact-link { display: flex; align-items: center; gap: 1rem; padding: 1.1rem 1.4rem; transition: all 0.2s ease; cursor: pointer; }
.contact-link:hover { border-color: var(--accent); transform: translateY(-2px); }
.contact-link-icon { font-size: 1.1rem; color: var(--accent); width: 20px; text-align: center; }
.contact-link-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.1rem;
}
.contact-link-value { display: block; font-size: 0.875rem; color: var(--text-primary); font-weight: 500; }
.contact-form { display: flex; flex-direction: column; gap: 1.1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); letter-spacing: 0.03em; }
.form-group input, .form-group textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: vertical;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(224,112,48,0.12);
}

/* Footer */
footer { border-top: 1px solid var(--border); padding: 2rem 24px; }
.footer-container {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
footer p { font-size: 0.8rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 1rem; }
.footer-links a { font-size: 1.1rem; color: var(--text-muted); transition: color 0.2s ease; }
.footer-links a:hover { color: var(--accent-light); }

/* Responsive */
@media (max-width: 1100px) {
  .hero-photo-frame { width: 280px; }
}
@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 2.5rem;
    padding: 0 20px;
  }
  .hero-text { align-items: center; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-stack { justify-content: center; }
  .hero-photo-frame { width: 240px; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-cards { grid-template-columns: 1fr 1fr; }
  .project-card.featured { grid-column: span 1; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 72px 20px; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    background: var(--nav-mobile-bg);
    backdrop-filter: blur(16px);
    padding: 1.5rem 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    gap: 0.25rem;
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 0.6rem 0.85rem; }
  .nav-toggle { display: flex; }
  .nav-github { margin-left: 0 !important; }
  .hero-title { font-size: clamp(2rem, 10vw, 3.2rem); }
  .hero-actions { gap: 0.5rem; }
  .about-cards { grid-template-columns: 1fr; }
  .about-focus-card { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .github-cta { flex-direction: column; text-align: center; }
  .github-cta-icon { font-size: 2rem; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-container { flex-direction: column; text-align: center; }
  .edu-cards { grid-template-columns: 1fr; }
}