/* ─────────────────────────────────────────────────────────────
   HARSHA PORTFOLIO — style.css
   Premium dark/light theme · glassmorphism · responsive
   ───────────────────────────────────────────────────────────── */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Accent */
  --accent: #7c3aed;
  --accent-light: #a855f7;
  --accent-glow: rgba(124, 58, 237, 0.35);

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
}

/* Dark theme (default) */
[data-theme="dark"] {
  --bg: #0f0f13;
  --bg-2: #16161e;
  --bg-3: #1e1e2a;
  --surface: rgba(255,255,255,0.05);
  --surface-hover: rgba(255,255,255,0.09);
  --border: rgba(255,255,255,0.08);
  --text: #e8e8f0;
  --text-2: #9898b0;
  --text-3: #5a5a78;
  --nav-bg: rgba(15,15,19,0.85);
}

/* Light theme */
[data-theme="light"] {
  --bg: #f4f4f8;
  --bg-2: #ffffff;
  --bg-3: #ebebf5;
  --surface: rgba(0,0,0,0.04);
  --surface-hover: rgba(0,0,0,0.07);
  --border: rgba(0,0,0,0.09);
  --text: #16161e;
  --text-2: #5a5a78;
  --text-3: #9898b0;
  --nav-bg: rgba(244,244,248,0.85);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── Utilities ───────────────────────────────────────────────── */
.container {
  width: min(1140px, 92vw);
  margin-inline: auto;
}

.accent { color: var(--accent-light); }

.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
}

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

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: .925rem;
  font-weight: 600;
  transition: all var(--duration) var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-light);
  border: 1.5px solid var(--accent-light);
}
.btn-outline:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.btn-sm { padding: .45rem 1rem; font-size: .85rem; }

/* ── Navbar ──────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  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 var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.navbar.scrolled {
  box-shadow: 0 4px 40px rgba(0,0,0,.3);
}

.nav-container {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 64px;
  width: min(1140px, 92vw);
  margin-inline: auto;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.03em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 2rem;
  margin-left: auto;
}

.nav-link {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--duration) var(--ease);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: var(--radius-full);
  transition: width var(--duration) var(--ease);
}

.nav-link:hover,
.nav-link.active { color: var(--text); }

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-left: 1.5rem;
}

.theme-toggle {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 1rem;
  transition: background var(--duration) var(--ease),
              transform .2s var(--ease);
}
.theme-toggle:hover { transform: rotate(20deg); background: var(--surface-hover); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}
.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--duration) var(--ease);
}

.mobile-menu {
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}
.mobile-menu li { padding: .5rem 0; }
.mobile-menu .nav-link { font-size: 1rem; }

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  min-height: 100svh;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  padding-block: 120px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .35;
}
.orb-1 {
  width: 600px; height: 600px;
  top: -200px; right: -150px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
}
.orb-2 {
  width: 500px; height: 500px;
  bottom: -150px; left: -100px;
  background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
  opacity: .2;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: .4;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.hero-greeting {
  font-size: 1rem;
  color: var(--accent-light);
  font-weight: 500;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.hero-name {
  font-size: clamp(2rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 40%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-size: clamp(1.2rem, 3.5vw, 1.8rem);
  font-weight: 400;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: .25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.typed-text {
  font-family: var(--font-mono);
  color: var(--accent-light);
  font-weight: 600;
}

.typed-cursor {
  color: var(--accent-light);
  animation: blink 1s step-end infinite;
  font-family: var(--font-mono);
}

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-bio {
  max-width: 540px;
  font-size: 1.05rem;
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: .5rem;
}

.hero-social {
  display: flex;
  gap: 1rem;
  margin-top: .25rem;
}

.social-link {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: all var(--duration) var(--ease);
}
.social-link:hover {
  color: var(--accent-light);
  border-color: var(--accent-light);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.scroll-down {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  color: var(--text-3);
  animation: bounce 2.5s ease-in-out infinite;
}
.scroll-down span {
  display: block;
  width: 1px;
  height: 42px;
  background: linear-gradient(to bottom, transparent, var(--accent-light));
  border-radius: 1px;
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(8px)} }

/* ── Sections ────────────────────────────────────────────────── */
.section {
  padding-block: 96px;
}

.section:nth-child(even) { background: var(--bg-2); }

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-light);
  background: rgba(124,58,237,.12);
  border: 1px solid rgba(124,58,237,.3);
  padding: .25rem .75rem;
  border-radius: var(--radius-full);
  margin-bottom: .75rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -.03em;
}

.section-subtitle {
  margin-top: .5rem;
  color: var(--text-2);
  font-size: .95rem;
}

/* ── About ────────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  color: var(--text-2);
  margin-bottom: 1rem;
  font-size: 1.02rem;
}

.about-text strong { color: var(--text); }

.about-stats {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  min-width: 80px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: .78rem;
  color: var(--text-3);
  text-align: center;
  margin-top: .2rem;
}

.about-card {
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.about-card h3 {
  font-size: .8rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.strength-list { display: flex; flex-direction: column; gap: 1.25rem; }

.strength-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.strength-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: .1rem;
}

.strength-list strong {
  display: block;
  font-size: .95rem;
  margin-bottom: .2rem;
}

.strength-list p {
  font-size: .85rem;
  color: var(--text-2);
  margin: 0;
}

/* ── Projects ─────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: .4rem 1rem;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: all var(--duration) var(--ease);
}

.filter-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* Loading */
.loading-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 4rem 2rem;
  color: var(--text-2);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-light);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Error state */
.error-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-2);
}

/* Project card */
.project-card {
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: .85rem;
  transition: transform var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease),
              border-color var(--duration) var(--ease);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow), transparent 60%);
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  border-color: rgba(124,58,237,.4);
}

.project-card:hover::before { opacity: 1; }

.project-card.featured {
  border-color: rgba(124,58,237,.5);
}

.featured-badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent-light);
  background: rgba(124,58,237,.12);
  border: 1px solid rgba(124,58,237,.3);
  padding: .2rem .6rem;
  border-radius: var(--radius-full);
  margin-bottom: -.2rem;
  width: fit-content;
}

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
  position: relative;
}

.project-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  word-break: break-word;
}

.project-link-icon {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: all var(--duration) var(--ease);
}
.project-link-icon:hover {
  color: var(--accent-light);
  border-color: var(--accent-light);
  transform: translateY(-2px);
}

.project-description {
  font-size: .875rem;
  color: var(--text-2);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: auto;
}

.project-lang {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  color: var(--text-2);
}

.lang-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent-light);
  flex-shrink: 0;
}

.project-stats {
  display: flex;
  gap: .75rem;
  font-size: .8rem;
  color: var(--text-3);
}

.project-stat {
  display: flex;
  align-items: center;
  gap: .3rem;
}

.project-updated {
  font-size: .78rem;
  color: var(--text-3);
}

.projects-footer {
  text-align: center;
  margin-top: 3rem;
}

/* Language dot colors */
.lang-JavaScript  { background: #f7df1e; }
.lang-Python      { background: #3572A5; }
.lang-TypeScript  { background: #3178c6; }
.lang-HTML        { background: #e34c26; }
.lang-CSS         { background: #563d7c; }
.lang-Java        { background: #b07219; }
.lang-C           { background: #555555; }
.lang-C\+\+       { background: #f34b7d; }
.lang-Shell       { background: #89e051; }
.lang-Go          { background: #00ADD8; }
.lang-Rust        { background: #dea584; }
.lang-Ruby        { background: #701516; }

/* ── Featured Projects ─────────────────────────────────────────── */
.featured-projects-section {
  background: var(--bg-2);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.75rem;
}

.featured-card {
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  transition: transform var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.featured-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}

.featured-card .featured-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: .75rem;
  font-weight: 600;
  padding: .3rem .7rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
}

.featured-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  padding-right: 5rem;
}

.featured-card > p {
  font-size: .95rem;
  color: var(--text-2);
  line-height: 1.6;
}

.project-features {
  list-style: none;
  padding: 0;
  margin: .5rem 0;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.project-features li {
  font-size: .85rem;
  color: var(--text-2);
  line-height: 1.5;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: auto;
  padding-top: .5rem;
}

.featured-card .btn {
  align-self: flex-start;
  margin-top: .5rem;
}

@media (max-width: 600px) {
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .featured-card h3 {
    padding-right: 0;
    margin-top: 1.5rem;
  }
}

/* ── Experience ────────────────────────────────────────────────── */
.timeline {
  position: relative;
  max-width: 700px;
  margin-inline: auto;
  padding-left: 2.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -2.5rem;
  top: 1.5rem;
  width: 16px; height: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 6px rgba(124,58,237,.3);
}

.timeline-content {
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
}

.timeline-period {
  font-size: .8rem;
  font-weight: 600;
  color: var(--accent-light);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.timeline-content h3 {
  margin-top: .4rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.timeline-place {
  font-size: .875rem;
  color: var(--text-2);
  margin-top: .2rem;
  margin-bottom: .75rem;
}

.timeline-content p {
  font-size: .9rem;
  color: var(--text-2);
  line-height: 1.65;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: 1rem;
}

.tag {
  font-size: .75rem;
  font-weight: 500;
  padding: .2rem .65rem;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,.1);
  border: 1px solid rgba(124,58,237,.25);
  color: var(--accent-light);
}

/* ── Certifications & Achievements ─────────────────────────── */
.certifications-section {
  background: var(--bg-2);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.cert-category h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.cert-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cert-card {
  display: flex;
  gap: 1rem;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  transition: transform var(--duration) var(--ease);
}

.cert-card:hover {
  transform: translateX(5px);
}

.cert-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
}

.cert-info h4 {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .25rem;
}

.cert-info p {
  font-size: .8rem;
  color: var(--text-2);
  margin-bottom: .5rem;
}

.cert-skills {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.chip-sm {
  font-size: .7rem;
  font-weight: 500;
  padding: .15rem .5rem;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
}

/* GitHub Stats */
.github-stats {
  text-align: center;
}

.github-stats h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.stats-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

.stats-cards img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  transition: transform var(--duration) var(--ease);
}

.stats-cards img:hover {
  transform: scale(1.02);
}

@media (max-width: 600px) {
  .certs-grid {
    grid-template-columns: 1fr;
  }
  .stats-cards {
    flex-direction: column;
    align-items: center;
  }
}

/* Proof Document Links */
.proof-link {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--duration) var(--ease);
}

.proof-link:hover {
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-2px);
}

/* ── Skills ─────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-category {
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.skill-category h3 {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 1.2rem;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.chip {
  font-size: .85rem;
  font-weight: 500;
  padding: .35rem .85rem;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-2);
  transition: all var(--duration) var(--ease);
}

.chip:hover {
  color: var(--accent-light);
  border-color: var(--accent-light);
  background: rgba(124,58,237,.08);
}

/* ── Contact ──────────────────────────────────────────────────── */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 900px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}

/* Contact Form */
.contact-form {
  padding: 2rem;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.form-group label {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-2);
}

.form-group input,
.form-group textarea {
  padding: .85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .95rem;
  transition: border-color var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-3);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  margin-top: .5rem;
}

.btn-submit svg {
  transition: transform var(--duration) var(--ease);
}

.btn-submit:hover svg {
  transform: translateX(3px);
}

/* Contact Cards */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (max-width: 500px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-card {
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: transform var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 48px rgba(0,0,0,.2);
}

.contact-icon { font-size: 2rem; margin-bottom: .75rem; }

.contact-card h3 {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: .6rem;
}

.contact-link {
  color: var(--accent-light);
  font-weight: 500;
  font-size: .95rem;
  transition: opacity var(--duration) var(--ease);
}
.contact-link:hover { opacity: .75; }

.copy-btn {
  color: var(--accent-light);
  font-weight: 500;
  font-size: .875rem;
  transition: opacity var(--duration) var(--ease);
  cursor: pointer;
  word-break: break-all;
}
.copy-btn:hover { opacity: .75; }

.copy-feedback {
  display: inline-block;
  font-size: .78rem;
  color: #10b981;
  font-weight: 500;
  margin-top: .35rem;
  animation: fadeIn .3s ease;
}

@keyframes fadeIn { from{opacity:0;transform:translateY(-4px)} to{opacity:1;transform:none} }

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.03em;
}

.footer-copy {
  font-size: .875rem;
  color: var(--text-2);
}

.footer-copy a { color: var(--accent-light); }
.footer-copy a:hover { text-decoration: underline; }

.footer-year {
  font-size: .8rem;
  color: var(--text-3);
}

/* ── Back to top ─────────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: all var(--duration) var(--ease);
  z-index: 900;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-card-wrap { order: -1; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-actions .btn-outline { display: none; }

  .hero { padding-block: 100px 60px; }

  .section { padding-block: 72px; }

  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .timeline { padding-left: 2rem; }

  .back-to-top { bottom: 1.25rem; right: 1.25rem; }
}

@media (max-width: 380px) {
  .hero-actions { flex-direction: column; align-items: center; }
}

/* ── Reduced motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
}