/* ═══════════════════════════════════════════════════
   JAVA DEVELOPER PORTFOLIO — portfolio.css
   Author: Alex Morgan
   ═══════════════════════════════════════════════════ */

/* ── 0. Google Fonts & Reset ──────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;600;700&family=Inter:wght@300;400;600;700&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
img { max-width: 100%; display: block; }
a { text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; }

/* ── 1. CSS Custom Properties ─────────────────────── */
:root {
  /* Colors — Dark theme */
  --bg:          #0d1117;
  --bg-alt:      #0a0f1e;
  --bg-card:     #161b22;
  --bg-card-hover: #1c2230;
  --border:      #21262d;
  --border-accent: #f89820;

  --accent:      #f89820;
  --accent-dim:  rgba(248,152,32,0.15);
  --accent-glow: rgba(248,152,32,0.35);
  --blue:        #2196f3;
  --blue-dim:    rgba(33,150,243,0.15);

  --text-primary:   #e6edf3;
  --text-secondary: #8b949e;
  --text-muted:     #484f58;
  --text-code:      #f89820;

  /* Typography */
  --font-body:  'Inter', system-ui, sans-serif;
  --font-code:  'JetBrains Mono', monospace;

  /* Spacing (8px grid) */
  --sp-1:  8px;
  --sp-2:  16px;
  --sp-3:  24px;
  --sp-4:  32px;
  --sp-5:  40px;
  --sp-6:  48px;
  --sp-8:  64px;
  --sp-12: 96px;
  --sp-16: 128px;

  /* Layout */
  --max-w: 1100px;
  --radius: 10px;
  --radius-sm: 6px;

  /* Transitions */
  --trans: 0.25s ease;
  --trans-slow: 0.45s ease;
}

/* Light theme overrides */
[data-theme="light"] {
  --bg:          #f0f4f8;
  --bg-alt:      #e8edf4;
  --bg-card:     #ffffff;
  --bg-card-hover: #f5f8ff;
  --border:      #d0d7de;
  --text-primary:   #1c2128;
  --text-secondary: #57606a;
  --text-muted:     #adb5bd;
}

/* ── 2. Base ──────────────────────────────────────── */
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--trans-slow), color var(--trans-slow);
}

/* ── 3. Custom Cursor ─────────────────────────────── */
.cursor-dot,
.cursor-ring {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: opacity var(--trans);
}
.cursor-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
}
.cursor-ring {
  width: 30px;
  height: 30px;
  border: 1.5px solid var(--accent);
  opacity: 0.5;
  transition: transform 0.12s ease, width 0.2s, height 0.2s, opacity var(--trans);
}
body:not(.cursor-active) .cursor-dot,
body:not(.cursor-active) .cursor-ring { opacity: 0; }
@media (pointer: coarse) { .cursor-dot, .cursor-ring { display: none; } }

/* ── 4. Scroll Progress Bar ───────────────────────── */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--blue));
  z-index: 1000;
  width: 0%;
  transition: width 0.1s linear;
}

/* ── 5. Navbar ────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: var(--sp-2) 0;
  transition: background var(--trans), box-shadow var(--trans), backdrop-filter var(--trans);
}
.navbar.scrolled {
  background: rgba(13,17,23,0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--border);
}
[data-theme="light"] .navbar.scrolled {
  background: rgba(240,244,248,0.80);
}
.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}
.nav-brand {
  font-family: var(--font-code);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 2px;
  white-space: nowrap;
}
.nav-brand .accent { color: var(--accent); }
.cursor-blink {
  color: var(--accent);
  animation: blink 1.1s step-end infinite;
  font-size: 1rem;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.nav-links {
  display: flex;
  gap: var(--sp-1);
  margin-left: auto;
}
.nav-link {
  font-family: var(--font-code);
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--trans), background var(--trans);
}
.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: var(--accent-dim);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}
.theme-toggle {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: background var(--trans), color var(--trans);
}
.theme-toggle:hover { background: var(--accent-dim); color: var(--accent); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--trans), opacity var(--trans);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 6. Hero ──────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 100px var(--sp-4) var(--sp-8);
}

/* Floating keywords background */
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.keyword {
  position: absolute;
  font-family: var(--font-code);
  font-size: clamp(0.65rem, 1.2vw, 0.85rem);
  color: var(--accent);
  opacity: 0;
  white-space: nowrap;
  animation: floatUp linear infinite;
  user-select: none;
}
@keyframes floatUp {
  0%   { opacity: 0;    transform: translateY(0)   rotate(var(--rot,0deg)); }
  10%  { opacity: 0.12; }
  90%  { opacity: 0.08; }
  100% { opacity: 0;    transform: translateY(-110vh) rotate(var(--rot,0deg)); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
}

.hero-code-block {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  margin-bottom: var(--sp-4);
  text-align: left;
}
.code-comment {
  font-family: var(--font-code);
  font-size: clamp(0.75rem, 1.8vw, 0.95rem);
  color: var(--text-secondary);
  line-height: 1.8;
  white-space: pre;
  min-height: 4.5em;
}
.code-comment .kw   { color: #569cd6; }
.code-comment .str  { color: #ce9178; }
.code-comment .var  { color: var(--text-primary); }
.code-comment .cmt  { color: #6a9955; }

.hero-name {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.1;
  margin-bottom: var(--sp-2);
}
.name-accent {
  color: var(--accent);
  position: relative;
}
.name-accent::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--blue));
  border-radius: 2px;
}

.hero-role {
  font-family: var(--font-code);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--text-secondary);
  margin-bottom: var(--sp-5);
  letter-spacing: 0.5px;
}

.hero-cta {
  display: flex;
  gap: var(--sp-2);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--sp-4);
}

/* ── 7. Buttons ───────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font-code);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: transform var(--trans), box-shadow var(--trans), background var(--trans), border-color var(--trans);
}
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-outline {
  border: 1.5px solid var(--accent);
  color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent-dim);
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-full { width: 100%; justify-content: center; }

/* ── 8. Hero Socials ──────────────────────────────── */
.hero-socials {
  display: flex;
  gap: var(--sp-2);
  justify-content: center;
}
.social-link {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: color var(--trans), border-color var(--trans), transform var(--trans), box-shadow var(--trans);
}
.social-link svg { width: 18px; height: 18px; }
.social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px var(--accent-glow);
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex; align-items: center; justify-content: center;
  width: 28px;
  z-index: 1;
}
.scroll-hint-line {
  display: block;
  width: 2px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  border-radius: 2px;
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { opacity: 0.8; transform: scaleY(1); }
  50%      { opacity: 0.3; transform: scaleY(0.6); }
}

/* ── 9. Sections ──────────────────────────────────── */
.section {
  padding: var(--sp-16) var(--sp-4);
}
.section-alt { background: var(--bg-alt); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-header {
  margin-bottom: var(--sp-8);
}
.section-label {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 1px;
  display: block;
  margin-bottom: var(--sp-1);
}
.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  width: 48px; height: 3px;
  background: var(--accent);
  border-radius: 2px;
}
.section-subtitle {
  margin-top: var(--sp-3);
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 480px;
}

/* ── 10. Scroll Reveal Animations ─────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* ── 11. About ────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--sp-8);
  align-items: center;
}
.photo-frame {
  position: relative;
  width: 240px;
  height: 280px;
  margin: 0 auto;
}
.photo-placeholder {
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.photo-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-dim), transparent 60%);
}
.photo-glow {
  position: absolute;
  inset: -4px;
  border-radius: 14px;
  background: transparent;
  border: 2px solid var(--accent);
  opacity: 0.5;
  animation: photoGlow 3s ease-in-out infinite;
}
@keyframes photoGlow {
  0%,100% { box-shadow: 0 0 12px var(--accent-glow); opacity: 0.5; }
  50%      { box-shadow: 0 0 28px var(--accent-glow), 0 0 48px var(--accent-glow); opacity: 0.9; }
}

.about-bio {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: var(--sp-3);
}
.about-bio strong { color: var(--text-primary); }

.about-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  margin-top: var(--sp-3);
}
.badge {
  font-family: var(--font-code);
  font-size: 0.78rem;
  padding: 6px 14px;
  border-radius: 20px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* ── 12. Timeline (Experience) ────────────────────── */
.timeline {
  position: relative;
  padding-left: 36px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 9px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--sp-5);
}
.timeline-dot {
  position: absolute;
  left: -33px;
  top: 22px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--border);
  transition: border-color var(--trans), box-shadow var(--trans);
  z-index: 1;
}
.timeline-item.visible .timeline-dot {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim);
  animation: dotPulse 1s ease-out;
}
@keyframes dotPulse {
  0%   { box-shadow: 0 0 0 0 var(--accent-glow); }
  70%  { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 4px var(--accent-dim); }
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
}
.timeline-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.3);
  border-color: var(--accent);
}

.timeline-header { margin-bottom: var(--sp-2); }
.timeline-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.timeline-meta {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.timeline-company {
  font-family: var(--font-code);
  font-size: 0.82rem;
  color: var(--accent);
}
.timeline-date {
  font-family: var(--font-code);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--sp-2);
}
.tag {
  font-family: var(--font-code);
  font-size: 0.73rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.timeline-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}
.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.timeline-bullets li strong { color: var(--text-primary); }

/* ── 13. Skills ───────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-3);
}
.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  transition: border-color var(--trans), box-shadow var(--trans);
}
.skill-group:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-dim);
}
.skill-group-header {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: var(--sp-2);
}
.skill-icon { font-size: 1.3rem; }
.skill-group-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.skill-tag {
  font-family: var(--font-code);
  font-size: 0.75rem;
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: default;
  transition: color var(--trans), border-color var(--trans), box-shadow var(--trans), background var(--trans);
}
.skill-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ── 14. Projects ─────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-3);
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.35);
  border-color: var(--accent);
}
.project-top-border {
  height: 3px;
  background: var(--accent);
  transition: box-shadow var(--trans);
}
.project-card:hover .project-top-border {
  box-shadow: 0 0 14px var(--accent-glow), 0 0 28px var(--accent-glow);
}
.project-body { padding: var(--sp-3); display: flex; flex-direction: column; flex: 1; }
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--sp-2);
}
.project-icon { font-size: 1.8rem; }
.project-links {
  display: flex;
  gap: var(--sp-2);
}
.project-link {
  font-family: var(--font-code);
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: color var(--trans), border-color var(--trans), background var(--trans);
}
.project-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}
.project-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--sp-1);
}
.project-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: var(--sp-2);
  flex: 1;
}
.project-highlights {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: var(--sp-2);
}
.highlight {
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--blue);
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

/* ── 15. Education ────────────────────────────────── */
.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--sp-3);
  align-items: start;
}
.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  display: flex;
  gap: var(--sp-2);
  align-items: flex-start;
  grid-column: 1 / 2;
  transition: border-color var(--trans), box-shadow var(--trans);
}
.edu-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 18px var(--accent-dim);
}
.edu-icon-wrap { font-size: 2rem; flex-shrink: 0; }
.edu-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.edu-school {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 2px;
  font-family: var(--font-code);
}
.edu-year, .edu-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.edu-note { margin-top: 4px; }

.cert-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-3);
  text-align: center;
  overflow: hidden;
  transition: transform var(--trans), border-color var(--trans), box-shadow var(--trans);
}
.cert-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.cert-shimmer {
  position: absolute;
  top: -100%; left: -100%;
  width: 60%; height: 200%;
  background: linear-gradient(105deg, transparent 40%, rgba(248,152,32,0.12) 50%, transparent 60%);
  transform: skewX(-20deg);
  transition: top 0.6s ease, left 0.6s ease;
}
.cert-card:hover .cert-shimmer {
  top: -10%;
  left: 150%;
}
.cert-icon { font-size: 2.2rem; margin-bottom: var(--sp-1); display: block; }
.cert-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.cert-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--sp-2);
}
.cert-badge {
  font-family: var(--font-code);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* ── 16. Contact ──────────────────────────────────── */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--sp-8);
  align-items: start;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-label {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}
.form-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--trans), box-shadow var(--trans);
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.form-textarea { resize: vertical; min-height: 130px; }
.form-status {
  font-family: var(--font-code);
  font-size: 0.82rem;
  text-align: center;
  min-height: 1.2em;
}
.form-status.success { color: #3fb950; }
.form-status.error   { color: #f85149; }

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-top: var(--sp-1);
}
.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.contact-label {
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.contact-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: color var(--trans);
}
a.contact-value:hover { color: var(--accent); }

/* ── 17. Footer ───────────────────────────────────── */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: var(--sp-5) var(--sp-4);
  text-align: center;
  position: relative;
}
.footer-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.footer-sub {
  font-family: var(--font-code);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.footer .accent { color: var(--accent); }

.back-to-top {
  position: absolute;
  right: var(--sp-4);
  bottom: var(--sp-4);
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: color var(--trans), border-color var(--trans), transform var(--trans), box-shadow var(--trans);
}
.back-to-top:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px var(--accent-glow);
}

/* ── 18. Responsive ───────────────────────────────── */
@media (max-width: 900px) {
  .education-grid {
    grid-template-columns: 1fr 1fr;
  }
  .edu-card { grid-column: 1 / 3; }

  .contact-wrap { grid-template-columns: 1fr; }
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .about-badges { justify-content: center; }
  .photo-frame { margin: 0 auto var(--sp-4); }
}

@media (max-width: 768px) {
  .section { padding: var(--sp-12) var(--sp-3); }

  .nav-links {
    position: fixed;
    inset: 0; top: 60px;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sp-3);
    transform: translateX(100%);
    transition: transform var(--trans-slow);
    z-index: 800;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { font-size: 1.1rem; padding: 10px 24px; }
  .nav-hamburger { display: flex; }

  .form-row { grid-template-columns: 1fr; }
  .education-grid { grid-template-columns: 1fr; }
  .edu-card { grid-column: auto; }

  .timeline { padding-left: 28px; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2rem; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .projects-grid, .skills-grid { grid-template-columns: 1fr; }
}

/* ── 19. Selection & Scrollbar ────────────────────── */
::selection {
  background: var(--accent-dim);
  color: var(--accent);
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }