/* ═══════════════════════════════════════════════
   RAJ GOSWAMI PORTFOLIO — STYLE SYSTEM
   Premium · Minimal · Human-crafted
   ═══════════════════════════════════════════════ */

/* ─── TOKENS ─────────────────────────────────── */
:root {
  /* Dark theme */
  --bg-primary:     #0a0a0b;
  --bg-secondary:   #111113;
  --bg-card:        #141417;
  --bg-card-hover:  #18181c;
  --border:         rgba(255,255,255,0.07);
  --border-hover:   rgba(255,255,255,0.14);
  --text-primary:   #f0f0f0;
  --text-secondary: #8a8a95;
  --text-muted:     #4a4a58;
  --accent:         #3b82f6;
  --accent-dim:     rgba(59,130,246,0.12);
  --accent-glow:    rgba(59,130,246,0.25);
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:      0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg:      0 12px 48px rgba(0,0,0,0.7);
  --nav-bg:         rgba(10,10,11,0.85);
  --code-bg:        #0d0d10;
  --radius-sm:      6px;
  --radius-md:      10px;
  --radius-lg:      16px;
  --transition:     200ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary:     #fafaf9;
  --bg-secondary:   #f4f4f2;
  --bg-card:        #ffffff;
  --bg-card-hover:  #f8f8f8;
  --border:         rgba(0,0,0,0.08);
  --border-hover:   rgba(0,0,0,0.16);
  --text-primary:   #0f0f11;
  --text-secondary: #5a5a68;
  --text-muted:     #b0b0bb;
  --accent:         #2563eb;
  --accent-dim:     rgba(37,99,235,0.08);
  --accent-glow:    rgba(37,99,235,0.18);
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:      0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg:      0 12px 48px rgba(0,0,0,0.12);
  --nav-bg:         rgba(250,250,249,0.88);
  --code-bg:        #f0f0ee;
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.35s ease, color 0.35s ease;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
::selection { background: var(--accent-dim); color: var(--accent); }

/* ─── LAYOUT ─────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}

.section { padding: 100px 0; }

/* ─── NAVIGATION ─────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: color var(--transition);
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}

.nav-link {
  font-size: 13.5px;
  font-weight: 450;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  transition: color var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 12px; margin-left: 24px; }

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.theme-toggle:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-secondary);
}

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

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 16px 32px 20px;
  border-top: 1px solid var(--border);
  gap: 4px;
}
.mobile-menu.open { display: flex; }
.mob-link {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.mob-link:hover { color: var(--text-primary); }

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

/* Two-column hero layout */
.hero-content {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 64px;
}

/* ─── HERO PHOTO ─────────────────────────────── */
.hero-photo-col {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-photo-frame {
  position: relative;
  width: 340px;
  height: 420px;
  border-radius: 18px;
  overflow: hidden;
  /* subtle accent border */
  box-shadow:
    0 0 0 1px rgba(59,130,246,0.18),
    0 24px 64px rgba(0,0,0,0.6);
}
.hero-photo-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 55%,
    var(--bg-primary) 100%
  );
  z-index: 1;
  pointer-events: none;
}
.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  /* blend with dark bg in dark mode */
  mix-blend-mode: luminosity;
  filter: grayscale(15%) contrast(1.05);
  transition: filter 0.35s ease, mix-blend-mode 0.35s ease;
}
[data-theme="light"] .hero-photo {
  mix-blend-mode: normal;
  filter: none;
}
[data-theme="dark"] .hero-photo-frame {
  background: #0a0a0b;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  opacity: 0.55;
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  background-image: url('hero-bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.5s ease;
}
[data-theme="dark"] .hero-bg-image {
  opacity: 0.32;
}
[data-theme="light"] .hero-bg-image {
  opacity: 0.06;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--bg-primary) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
  padding-top: 80px;
  width: 100%;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}
.hero-eyebrow::before {
  content: '';
  display: block; width: 24px; height: 1px;
  background: var(--accent);
}

.hero-name {
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.0;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.hero-title {
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: 28px;
}
.divider {
  margin: 0 10px;
  opacity: 0.4;
}

.hero-tagline {
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 350;
  color: var(--text-primary);
  opacity: 0.85;
  max-width: 600px;
  line-height: 1.5;
  margin-bottom: 44px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

/* ─── BUTTONS ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
  background: #2563eb;
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--bg-secondary);
}

.btn-full { width: 100%; }

/* ─── SCROLL HINT ────────────────────────────── */
.hero-scroll-hint {
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0.45;
}
.scroll-line {
  display: block; width: 32px; height: 1px;
  background: var(--text-secondary);
}
.scroll-text {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ─── REVEAL ANIMATION ───────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* stagger children */
.hero-eyebrow.reveal { transition-delay: 0.1s; }
.hero-name.reveal     { transition-delay: 0.2s; }
.hero-title.reveal    { transition-delay: 0.3s; }
.hero-tagline.reveal  { transition-delay: 0.4s; }
.hero-cta.reveal      { transition-delay: 0.5s; }
.hero-scroll-hint.reveal { transition-delay: 0.7s; }

/* ─── SECTION COMMON ─────────────────────────── */
.section-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-heading {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--text-primary);
}

.section-header {
  margin-bottom: 56px;
}
.section-sub {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
}

/* ─── ABOUT ──────────────────────────────────── */
.about-section { background: var(--bg-secondary); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
  align-items: start;
}

.about-left { position: sticky; top: 100px; }

.about-para {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.78;
  margin-bottom: 20px;
}
.about-para em { color: var(--text-primary); font-style: normal; font-weight: 500; }
.about-para:last-of-type { margin-bottom: 40px; }

.about-facts {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.fact { display: flex; flex-direction: column; gap: 4px; }
.fact-num {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.fact-label { font-size: 12px; color: var(--text-muted); }

/* ─── ABOUT PHOTO ────────────────────────────── */
.about-photo-wrap {
  margin-top: 32px;
  width: 200px;
  height: 240px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--border), var(--shadow-md);
}
.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform 0.5s ease;
}
.about-photo-wrap:hover .about-photo {
  transform: scale(1.03);
}

/* ─── SKILLS ─────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 56px;
}

.skill-group-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 450;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.tag:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-secondary);
}
.tag-accent {
  border-color: rgba(59,130,246,0.3);
  color: var(--accent);
  background: var(--accent-dim);
}
.tag-accent:hover {
  background: rgba(59,130,246,0.2);
  border-color: var(--accent);
}

/* ─── PROJECTS ───────────────────────────────── */
.projects-section { background: var(--bg-secondary); }

.projects-list { display: flex; flex-direction: column; gap: 2px; }

.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
  cursor: default;
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.project-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.project-card-inner { padding: 36px 40px 40px; }
.project-card + .project-card { margin-top: 16px; }

.project-card-accent {
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--accent);
  transition: height 0.3s ease;
  border-radius: 0 0 2px 2px;
}
.project-card:hover .project-card-accent { height: 100%; }

.project-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.project-year {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 450;
}
.project-stack {
  font-size: 12px;
  color: var(--accent);
  font-weight: 450;
}

.project-title {
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 650;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.project-badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.project-pia {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.pia-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.pia-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ─── PROMPT / AI SECTION ────────────────────── */
.prompt-section { background: var(--bg-primary); }

.case-studies { display: flex; flex-direction: column; gap: 24px; }

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 40px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.case-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.case-number {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}

.case-title {
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.case-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 660px;
  margin-bottom: 24px;
}

/* Code block */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 20px;
}
.code-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}
.code-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.code-dot.red    { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green  { background: #27c93f; }
.code-lang {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
}
.code-body {
  padding: 20px 20px;
  overflow-x: auto;
}
.code-body code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 12.5px;
  line-height: 1.75;
  color: #a8c7fa;
  white-space: pre;
}

/* Iteration flow */
.iteration-flow { display: flex; flex-direction: column; gap: 8px; }
.iter-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.iter-version {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
}
.iter-prompt { font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; font-style: italic; }
.iter-output { font-size: 13px; }
.iter-output.bad  { color: #f87171; }
.iter-output.good { color: #34d399; }
.iter-arrow { font-size: 12px; color: var(--text-muted); padding-left: 8px; }

/* Edge cases */
.edge-cases { display: flex; flex-direction: column; gap: 2px; }
.edge-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.edge-item:hover { background: var(--bg-secondary); }
.edge-type {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 180px;
  flex-shrink: 0;
}
.edge-handling {
  font-size: 13px;
  color: var(--text-secondary);
}

.case-result {
  display: flex;
  gap: 10px;
  align-items: baseline;
  background: var(--accent-dim);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
}
.case-result-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  flex-shrink: 0;
}
.case-result span:last-child { font-size: 13.5px; color: var(--text-secondary); }

/* ─── EXPERIENCE ─────────────────────────────── */
.experience-section { background: var(--bg-secondary); }

.timeline { display: flex; flex-direction: column; gap: 0; margin-bottom: 56px; }

.timeline-item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 24px;
  padding-bottom: 48px;
  position: relative;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: 11px; top: 24px; bottom: 0;
  width: 1px;
  background: var(--border);
}
.timeline-item:last-child::before { display: none; }

.timeline-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.timeline-dot-edu { border-color: var(--border); }

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 3px;
}
.timeline-company {
  font-size: 13px;
  color: var(--accent);
}
.timeline-period {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 3px;
}

.timeline-impacts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.timeline-impacts li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  padding-left: 16px;
  position: relative;
}
.timeline-impacts li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--text-muted);
  background-image: url('hero-bg.png');
  font-size: 12px;
  top: 1px;
}

.timeline-edu-note { font-size: 14px; color: var(--text-secondary); }

/* Certifications */
.certifications {
  border-top: 1px solid var(--border);
  padding-top: 36px;
}
.cert-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.cert-list { display: flex; flex-direction: column; gap: 10px; }
.cert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}
.cert-icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
  flex-shrink: 0;
}

/* ─── CONTACT ────────────────────────────────── */
.contact-section { background: var(--bg-primary); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact-heading {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.contact-sub {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 360px;
}

.contact-links { display: flex; flex-direction: column; gap: 14px; }

.contact-link {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.contact-link:hover { color: var(--text-primary); }
.contact-link-icon {
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
  font-family: 'SFMono-Regular', monospace;
  transition: all var(--transition);
}
.contact-link:hover .contact-link-icon {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-label {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.form-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition);
  width: 100%;
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--accent);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-textarea { min-height: 130px; resize: vertical; }

.form-note { font-size: 13px; color: var(--text-secondary); min-height: 18px; }
.form-note.success { color: #34d399; }
.form-note.error   { color: #f87171; }

/* ─── FOOTER ─────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.footer-copy {
  font-size: 12.5px;
  color: var(--text-muted);
}
.footer-back {
  font-size: 12.5px;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-back:hover { color: var(--accent); }

/* ─── RESPONSIVE ─────────────────────────────── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  /* Hero: stack vertically, photo below text */
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-photo-col {
    order: -1;
    justify-content: flex-start;
  }
  .hero-photo-frame {
    width: 220px;
    height: 270px;
    border-radius: 14px;
  }

  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-left { position: static; }
  .about-photo-wrap { width: 160px; height: 190px; }

  .skills-grid { grid-template-columns: 1fr; gap: 32px; }

  .project-pia { grid-template-columns: 1fr; gap: 20px; }

  .contact-grid { grid-template-columns: 1fr; gap: 56px; }

  .edge-type { min-width: 140px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .hero-content { padding: 0 20px; padding-top: 80px; }
  .nav-inner { padding: 0 20px; }
  .mobile-menu { padding: 16px 20px 20px; }
  .project-card-inner { padding: 24px 24px 28px; }
  .case-card { padding: 28px 24px; }
  .about-facts { gap: 28px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
  .br-desktop { display: none; }
  .edge-item { flex-direction: column; gap: 4px; }
  .edge-type { min-width: auto; }
}

/* ─── SCROLLBAR ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ─── SECTION SCROLL REVEAL ──────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}