/* ═══════════════════════════════════════════════
   BIPLOV SINGH — PORTFOLIO STYLESHEET
   biplovsingh.dev
══════════════════════════════════════════════ */

/* ── Custom Properties ── */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Dark theme (default) */
  --bg:         #0a0e1a;
  --bg-2:       #0f1623;
  --bg-3:       #151d2e;
  --bg-card:    #111827;
  --bg-card-hover: #161f30;
  --border:     rgba(255,255,255,0.07);
  --border-hover: rgba(99,202,255,0.35);

  --text:       #e8edf5;
  --text-muted: #8a96aa;
  --text-faint: #4a5568;

  --accent:          #00c8ff;
  --accent-2:        #7c3aed;
  --accent-glow:     rgba(0, 200, 255, 0.18);
  --accent-glow-2:   rgba(124, 58, 237, 0.15);

  --gradient: linear-gradient(135deg, #00c8ff 0%, #7c3aed 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(0,200,255,0.1), rgba(124,58,237,0.1));

  --success: #22c55e;
  --error:   #ef4444;
  --warn:    #f59e0b;

  --radius-sm:  6px;
  --radius:     12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-accent: 0 0 30px rgba(0,200,255,0.15);

  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --nav-h: 68px;
}

[data-theme="light"] {
  --bg:         #f8fafc;
  --bg-2:       #f1f5f9;
  --bg-3:       #e8eef7;
  --bg-card:    #ffffff;
  --bg-card-hover: #f0f7ff;
  --border:     rgba(0,0,0,0.08);
  --border-hover: rgba(0,150,220,0.4);

  --text:       #0f172a;
  --text-muted: #475569;
  --text-faint: #94a3b8;

  --accent:          #0284c7;
  --accent-2:        #7c3aed;
  --accent-glow:     rgba(2,132,199,0.12);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  font-size: 16px;
}

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

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

/* ── Utilities ── */
.container {
  width: min(1160px, 100% - 2.5rem);
  margin-inline: auto;
}

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

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ══════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition),
              backdrop-filter var(--transition);
}

.navbar.scrolled {
  background: rgba(10,14,26,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(248,250,252,0.85);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
}

.nav-logo:hover { color: var(--accent); }

.logo-bracket { color: var(--accent); }
.logo-accent  { color: var(--accent-2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.45rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 50%; right: 50%;
  height: 2px;
  background: var(--gradient);
  border-radius: 1px;
  transition: left var(--transition), right var(--transition);
}

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

.nav-link:hover::after,
.nav-link.active::after { left: 0.85rem; right: 0.85rem; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius-sm);
}

.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before { opacity: 0.06; }

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,200,255,0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,200,255,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
}

.btn-full { width: 100%; justify-content: center; }

/* ══════════════════════════════════════════
   SECTION COMMON
══════════════════════════════════════════ */
.section {
  padding-block: 7rem;
}

.section-alt {
  background: var(--bg-2);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* ══════════════════════════════════════════
   HERO
══════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

/* Animated background */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 40%, transparent 100%);
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.55;
}

.blob-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,200,255,0.18), transparent 70%);
  top: -10%; right: -5%;
  animation: floatBlob 12s ease-in-out infinite alternate;
}

.blob-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.15), transparent 70%);
  bottom: 0; left: -8%;
  animation: floatBlob 14s ease-in-out infinite alternate-reverse;
}

@keyframes floatBlob {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, -40px) scale(1.08); }
}

/* Hero layout */
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 520px;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
  padding-block: 4rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: #22c55e;
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 7px; height: 7px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50%       { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.hero-typewriter {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.typewriter {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95em;
  border-right: 2px solid var(--accent);
  padding-right: 3px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { border-color: transparent; }
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.stat { text-align: center; }

.stat-number {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-faint);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* Code window */
.code-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-accent);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.85rem 1.1rem;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.dot.red    { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green  { background: #27c93f; }

.window-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-left: auto;
}

.code-content {
  padding: 1.5rem;
  overflow-x: auto;
}

.code-content pre {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
}

/* Code syntax colors */
.kw  { color: #c792ea; }
.cls { color: #82aaff; font-weight: 600; }
.fn  { color: #82aaff; }
.var { color: #e8c07a; }
.str { color: #c3e88d; }
.op  { color: var(--text-muted); }
.cmt { color: #546e7a; font-style: italic; }
.bool{ color: #d16969; }

/* Scroll down indicator */
.scroll-down {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2.5s ease-in-out infinite;
}

.scroll-mouse {
  width: 26px; height: 42px;
  border: 2px solid var(--text-faint);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-wheel {
  width: 4px; height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollWheel 2.5s ease-in-out infinite;
}

@keyframes scrollWheel {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(-6px); }
}

/* ══════════════════════════════════════════
   ABOUT
══════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 5rem;
  align-items: start;
}

.about-lead {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 0.975rem;
}

.about-text p strong { color: var(--text); font-weight: 600; }

.about-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.info-item:hover { border-color: var(--border-hover); }

.info-item > i {
  font-size: 1rem;
  color: var(--accent);
  margin-top: 2px;
  flex-shrink: 0;
}

.info-label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.info-value {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}

/* About visual stack */
.about-card-stack {
  position: relative;
  margin-bottom: 1.5rem;
}

.about-avatar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

.avatar-placeholder {
  text-align: center;
  color: var(--text-faint);
}

.avatar-placeholder i {
  font-size: 5rem;
  margin-bottom: 0.5rem;
  display: block;
  color: var(--border-hover);
}

.avatar-hint {
  font-size: 0.75rem;
  color: var(--text-faint);
}

.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid;
  backdrop-filter: blur(8px);
  animation: floatBadge 3s ease-in-out infinite;
}

.badge-pytorch {
  background: rgba(238,76,44,0.12);
  border-color: rgba(238,76,44,0.3);
  color: #ee4c2c;
  top: -1rem; right: 1rem;
}

.badge-linux {
  background: rgba(255,188,0,0.1);
  border-color: rgba(255,188,0,0.3);
  color: #ffbc00;
  bottom: 0.5rem; left: -1.25rem;
  animation-delay: 0.8s;
}

.badge-python {
  background: rgba(0,200,255,0.1);
  border-color: rgba(0,200,255,0.25);
  color: var(--accent);
  top: 40%; right: -1.25rem;
  animation-delay: 1.6s;
}

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* Terminal snippet */
.terminal-snippet {
  background: #0d1117;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.window-bar.mini { padding: 0.65rem 0.9rem; }

.terminal-body {
  padding: 1rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.9;
}

.t-prompt { color: #22c55e; }
.t-sep    { color: var(--text-faint); }
.t-path   { color: #60a5fa; }
.t-dollar { color: var(--text-muted); }
.t-out    { color: #8a96aa; padding-left: 1rem; }
.t-success{ color: #22c55e; padding-left: 1rem; }
.t-cursor { animation: blink 1s step-end infinite; }

/* ══════════════════════════════════════════
   SKILLS
══════════════════════════════════════════ */
.skills-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.skill-category:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-accent);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.category-header i {
  font-size: 1.1rem;
  color: var(--accent);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-glow);
  border-radius: var(--radius-sm);
}

.category-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.skill-list { display: flex; flex-direction: column; gap: 0.6rem; }

.skill-chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: default;
}

.skill-chip:hover {
  border-color: var(--border-hover);
  background: var(--bg-3);
  transform: translateX(3px);
}

.skill-chip i {
  font-size: 0.9rem;
  color: var(--accent);
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.skill-chip span { flex: 1; }

.skill-level {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-level.expert    { background: rgba(0,200,255,0.12); color: var(--accent); }
.skill-level.proficient{ background: rgba(124,58,237,0.12); color: #a78bfa; }
.skill-level.learning  { background: rgba(245,158,11,0.12); color: #f59e0b; }

.skill-primary { border-color: rgba(0,200,255,0.2); }

.skills-legend {
  display: flex;
  justify-content: center;
  gap: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.legend-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 0.4rem;
}

.legend-dot.expert     { background: var(--accent); }
.legend-dot.proficient { background: #a78bfa; }
.legend-dot.learning   { background: #f59e0b; }

/* ══════════════════════════════════════════
   PROJECTS
══════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.75rem;
  margin-bottom: 3rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-subtle);
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-accent);
}

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

.project-featured {
  border-image: linear-gradient(135deg, rgba(0,200,255,0.4), rgba(124,58,237,0.3)) 1;
  border-width: 1px;
  border-style: solid;
}

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

.project-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient-subtle);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  font-size: 1.4rem;
  color: var(--accent);
}

.project-meta { display: flex; align-items: center; gap: 0.5rem; }

.project-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  font-weight: 600;
}

.project-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.badge-featured {
  background: var(--gradient);
  color: #fff;
}

.project-body { flex: 1; display: flex; flex-direction: column; gap: 0.85rem; }

.project-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.project-tagline {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  font-family: var(--font-mono);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

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

.project-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.highlight-item i {
  color: var(--success);
  font-size: 0.75rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  background: rgba(0,200,255,0.07);
  border: 1px solid rgba(0,200,255,0.18);
  border-radius: 100px;
  color: var(--text-muted);
  transition: all var(--transition);
}

.project-card:hover .tech-tag {
  background: rgba(0,200,255,0.1);
  border-color: rgba(0,200,255,0.3);
  color: var(--accent);
}

.project-footer {
  display: flex;
  gap: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.project-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color var(--transition);
  padding: 0.3rem 0;
}

.project-link:hover { color: var(--accent); }
.project-link-demo:hover { color: var(--accent-2); }

.project-link i { font-size: 0.8rem; }

.projects-cta {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.projects-cta p {
  font-size: 0.9rem;
  color: var(--text-faint);
}

/* ══════════════════════════════════════════
   CONTACT
══════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-lead {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-accent);
}

.contact-icon-wrap {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  border: 1px solid rgba(0,200,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.cl-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.cl-value {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,200,255,0.1);
}

.form-group input.error,
.form-group textarea.error { border-color: var(--error); }

.form-error {
  font-size: 0.75rem;
  color: var(--error);
  font-weight: 500;
  min-height: 1em;
}

.form-success {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  border-radius: var(--radius);
  color: var(--success);
  font-size: 0.875rem;
  font-weight: 600;
}

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
.footer {
  background: var(--bg-3);
  border-top: 1px solid var(--border);
  padding-top: 3.5rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 3rem;
  align-items: center;
  padding-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.footer-nav {
  display: flex;
  gap: 1.75rem;
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--accent); }

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
}

.footer-social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(0,200,255,0.3);
  transition: all var(--transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,200,255,0.4);
}

/* ══════════════════════════════════════════
   ANIMATIONS (AOS-like)
══════════════════════════════════════════ */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.65s cubic-bezier(0.25,0.46,0.45,0.94),
              transform 0.65s cubic-bezier(0.25,0.46,0.45,0.94);
}

[data-aos="fade-left"] {
  transform: translateX(30px);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateX(0) translateY(0);
}

[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual { order: -1; }

  .code-window {
    max-width: 600px;
    margin-inline: auto;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    text-align: center;
  }

  .footer-nav,
  .footer-social { justify-content: center; }
}

@media (max-width: 768px) {
  .section { padding-block: 5rem; }

  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 1.5rem;
    gap: 0.25rem;
    transform: translateY(-110%);
    transition: transform var(--transition);
    backdrop-filter: blur(16px);
  }

  .nav-links.open { transform: translateY(0); }

  .nav-link {
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
  }

  .nav-link::after { display: none; }

  .hero-stats { gap: 1.25rem; }

  .hero-title { font-size: 2.2rem; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; justify-content: center; }

  .about-info-grid { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }

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

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

  .back-to-top { right: 1rem; bottom: 1rem; }
}

@media (max-width: 480px) {
  .section-title { font-size: 1.8rem; }
  .contact-form { padding: 1.25rem; }
  .project-card { padding: 1.25rem; }
}