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

:root {
  --bg: #0a0a0b;
  --bg-2: #111113;
  --bg-3: #18181b;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.15);
  --text: #e4e4e7;
  --text-muted: #71717a;
  --text-dim: #3f3f46;
  --accent: #a78bfa;
  --accent-2: #818cf8;
  --accent-glow: rgba(167,139,250,0.15);
  --green: #4ade80;
  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { cursor: pointer; font-family: var(--font); }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; }
p { color: var(--text-muted); }

/* ===== LAYOUT ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }

/* ===== NAV ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; height: 60px;
  background: rgba(10,10,11,0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition);
}
.nav.scrolled { border-color: var(--border-hover); }
.nav-logo {
  font-weight: 700; font-size: 1.1rem; letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a {
  padding: 6px 14px; border-radius: 8px; font-size: 0.875rem;
  color: var(--text-muted); transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--bg-3); }
.nav-links a.active { color: var(--text); background: var(--bg-3); }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 4px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text-muted); border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; padding-top: 60px;
}
.hero-bg {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden;
}
.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;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(80px); pointer-events: none;
}
.glow-1 {
  width: 500px; height: 500px; top: 10%; left: 20%;
  background: radial-gradient(circle, rgba(167,139,250,0.12) 0%, transparent 70%);
  animation: floatGlow 8s ease-in-out infinite;
}
.glow-2 {
  width: 400px; height: 400px; top: 30%; right: 10%;
  background: radial-gradient(circle, rgba(129,140,248,0.08) 0%, transparent 70%);
  animation: floatGlow 10s ease-in-out infinite reverse;
}
@keyframes floatGlow {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}
.hero-content {
  position: relative; z-index: 1; text-align: center;
  max-width: 700px; padding: 0 24px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 100px;
  border: 1px solid var(--border); background: var(--bg-2);
  font-size: 0.8rem; color: var(--text-muted); margin-bottom: 32px;
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; } 50% { opacity: 0.4; }
}
.hero-title {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 700; letter-spacing: -0.04em;
  background: linear-gradient(135deg, #ffffff 0%, #a78bfa 50%, #818cf8 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.hero-tagline {
  font-family: var(--mono); font-size: 1rem;
  color: var(--accent); margin-bottom: 20px; letter-spacing: 0.02em;
}
.hero-desc {
  font-size: 1.05rem; color: var(--text-muted);
  max-width: 480px; margin: 0 auto 40px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 0.75rem; color: var(--text-dim); letter-spacing: 0.1em; text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--text-dim), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine { 0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
  100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; } }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px; border-radius: 10px;
  font-size: 0.9rem; font-weight: 500;
  border: 1px solid transparent;
  transition: all var(--transition); white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: #0a0a0b; border-color: var(--accent);
}
.btn-primary:hover {
  background: #c4b5fd; border-color: #c4b5fd;
  box-shadow: 0 0 20px rgba(167,139,250,0.4);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent; color: var(--text-muted);
  border-color: var(--border);
}
.btn-ghost:hover {
  color: var(--text); border-color: var(--border-hover);
  background: var(--bg-3); transform: translateY(-1px);
}
.btn-full { width: 100%; justify-content: center; }

/* ===== SECTION HEADER ===== */
.section-header {
  display: flex; align-items: baseline; gap: 16px;
  margin-bottom: 40px; flex-wrap: wrap;
}
.section-label {
  font-family: var(--mono); font-size: 0.75rem;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em;
}
.section-title { font-size: 1.75rem; color: var(--text); }
.section-link {
  margin-left: auto; font-size: 0.875rem; color: var(--text-muted);
  transition: color var(--transition);
}
.section-link:hover { color: var(--accent); }

/* ===== PAGE HEADER ===== */
.page-header {
  position: relative; padding: 120px 0 60px;
  overflow: hidden; border-bottom: 1px solid var(--border);
}
.page-header .container { position: relative; z-index: 1; }
.page-title { font-size: clamp(2.5rem, 6vw, 4rem); color: var(--text); margin: 8px 0 12px; }
.page-desc { font-size: 1.05rem; color: var(--text-muted); max-width: 500px; }

/* ===== CATEGORY COLORS ===== */
.cat-tool    { --cat-color: #a78bfa; }
.cat-system  { --cat-color: #60a5fa; }
.cat-game    { --cat-color: #4ade80; }
.cat-experiment { --cat-color: #fb923c; }
.cat-bot     { --cat-color: #f472b6; }
.cat-other   { --cat-color: #94a3b8; }

.cat-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 100px;
  font-size: 0.72rem; font-weight: 500; text-transform: capitalize;
  background: rgba(var(--cat-rgb, 167,139,250), 0.1);
  color: var(--cat-color, var(--accent));
  border: 1px solid rgba(var(--cat-rgb, 167,139,250), 0.2);
}
.cat-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--cat-color, var(--accent));
}

/* ===== BENTO GRID (homepage featured) ===== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 220px;
  gap: 16px;
}
.bento-card {
  position: relative; border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-2);
  padding: 28px; overflow: hidden;
  display: flex; flex-direction: column; justify-content: flex-end;
  cursor: pointer;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.bento-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at var(--mx,50%) var(--my,50%), var(--accent-glow) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.3s;
}
.bento-card:hover::before { opacity: 1; }
.bento-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.bento-card.large { grid-column: span 2; }
.bento-card.tall  { grid-row: span 2; }
.bento-card-bg {
  position: absolute; inset: 0; opacity: 0.04;
  font-size: 8rem; display: flex; align-items: center; justify-content: center;
  pointer-events: none; user-select: none;
}
.bento-card-content { position: relative; z-index: 1; }
.bento-card-name {
  font-size: 1.2rem; font-weight: 600; color: var(--text); margin-bottom: 6px;
}
.bento-card.large .bento-card-name { font-size: 1.5rem; }
.bento-card-desc {
  font-size: 0.82rem; color: var(--text-muted); margin-bottom: 14px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.bento-card-footer { display: flex; align-items: center; justify-content: space-between; }
.bento-card-links { display: flex; gap: 8px; }
.bento-link {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 10px; border-radius: 7px;
  font-size: 0.75rem; font-weight: 500;
  border: 1px solid var(--border); color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  transition: all var(--transition);
}
.bento-link:hover { border-color: var(--border-hover); color: var(--text); background: var(--bg-3); }
.bento-link.live { color: var(--green); border-color: rgba(74,222,128,0.2); }
.bento-link.live:hover { background: rgba(74,222,128,0.08); }

/* ===== CATEGORIES STRIP ===== */
.categories-strip {
  display: flex; gap: 12px; flex-wrap: wrap;
}
.cat-pill {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-2);
  cursor: pointer; transition: all var(--transition);
  text-decoration: none;
}
.cat-pill:hover {
  border-color: var(--border-hover); background: var(--bg-3);
  transform: translateY(-2px);
}
.cat-pill-icon { font-size: 1.2rem; }
.cat-pill-info { display: flex; flex-direction: column; }
.cat-pill-name { font-size: 0.875rem; font-weight: 500; color: var(--text); text-transform: capitalize; }
.cat-pill-count { font-size: 0.75rem; color: var(--text-muted); }

/* ===== PROJECTS PAGE ===== */
.filter-bar {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 36px;
}
.filter-btn {
  padding: 7px 16px; border-radius: 8px;
  font-size: 0.82rem; font-weight: 500;
  border: 1px solid var(--border); background: transparent;
  color: var(--text-muted); transition: all var(--transition);
  text-transform: capitalize;
}
.filter-btn:hover { color: var(--text); border-color: var(--border-hover); background: var(--bg-3); }
.filter-btn.active { color: var(--accent); border-color: var(--accent); background: var(--accent-glow); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.project-card {
  position: relative; border-radius: var(--radius-lg);
  border: 1px solid var(--border); background: var(--bg-2);
  padding: 24px; overflow: hidden;
  display: flex; flex-direction: column;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  animation: fadeUp 0.4s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.project-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at var(--mx,50%) var(--my,50%), var(--accent-glow) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.3s;
}
.project-card:hover::before { opacity: 1; }
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.35);
}
.project-card.hidden { display: none; }
.card-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 12px; }
.card-name { font-size: 1.05rem; font-weight: 600; color: var(--text); }
.card-desc {
  font-size: 0.85rem; color: var(--text-muted); flex: 1; margin-bottom: 20px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card-footer { display: flex; gap: 8px; margin-top: auto; }

/* ===== ABOUT PAGE ===== */
.about-grid {
  display: grid; grid-template-columns: 340px 1fr; gap: 48px; align-items: start;
}
.about-bio {
  position: sticky; top: 80px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px; text-align: center;
}
.about-avatar {
  position: relative; width: 80px; height: 80px; margin: 0 auto 16px;
}
.avatar-ring {
  position: absolute; inset: -4px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  animation: spin 6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.avatar-inner {
  position: relative; z-index: 1; width: 80px; height: 80px;
  border-radius: 50%; background: var(--bg-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; font-weight: 700; color: var(--accent);
}
.about-name { font-size: 1.4rem; color: var(--text); margin-bottom: 4px; }
.about-handle { font-family: var(--mono); font-size: 0.8rem; color: var(--text-muted); margin-bottom: 16px; }
.about-text { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 12px; text-align: left; }
.about-links { display: flex; gap: 10px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }

.about-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 32px;
}
.stat-card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 16px; text-align: center;
}
.stat-num {
  display: block; font-size: 2rem; font-weight: 700;
  color: var(--accent); font-family: var(--mono); margin-bottom: 4px;
}
.stat-label { font-size: 0.78rem; color: var(--text-muted); }

.skills-block {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
}
.skills-title { font-size: 1rem; color: var(--text); margin-bottom: 20px; }
.skills-list { display: flex; flex-direction: column; gap: 16px; }
.skill-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.skill-item:last-child { border-bottom: none; padding-bottom: 0; }
.skill-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 2px; }
.skill-item strong { display: block; font-size: 0.9rem; color: var(--text); margin-bottom: 2px; }
.skill-item p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== CONTACT PAGE ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start;
}
.contact-form-wrap {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 36px;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.82rem; font-weight: 500; color: var(--text-muted); }
.form-group input, .form-group textarea {
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 16px;
  color: var(--text); font-family: var(--font); font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dim); }
.form-error { font-size: 0.78rem; color: #f87171; min-height: 16px; }
.form-success {
  padding: 14px 18px; border-radius: 10px;
  background: rgba(74,222,128,0.08); border: 1px solid rgba(74,222,128,0.2);
  color: var(--green); font-size: 0.875rem; text-align: center;
}
.contact-info { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 80px; }
.contact-card {
  display: flex; align-items: center; gap: 16px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.contact-card-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--bg-3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); flex-shrink: 0;
}
.contact-card strong { display: block; font-size: 0.875rem; color: var(--text); margin-bottom: 2px; }
.contact-card a { font-size: 0.82rem; color: var(--text-muted); transition: color var(--transition); }
.contact-card a:hover { color: var(--accent); }
.contact-note {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.contact-note p { font-size: 0.85rem; color: var(--text-muted); }

/* ===== 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-logo {
  font-weight: 700; font-size: 1rem; letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.footer-copy { font-size: 0.82rem; color: var(--text-dim); }
.footer-gh {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.82rem; color: var(--text-muted);
  padding: 7px 14px; border-radius: 8px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.footer-gh:hover { color: var(--text); border-color: var(--border-hover); background: var(--bg-3); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .bento-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-card.large { grid-column: span 2; }
  .about-grid { grid-template-columns: 1fr; }
  .about-bio { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-info { position: static; }
}
@media (max-width: 640px) {
  .nav { padding: 0 16px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--border); padding: 12px; gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .bento-grid { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .bento-card.large { grid-column: span 1; }
  .bento-card.tall { grid-row: span 1; }
  .bento-card { min-height: 180px; }
  .about-stats { grid-template-columns: repeat(3, 1fr); }
  .section { padding: 56px 0; }
  .hero-actions { flex-direction: column; align-items: center; }
  .footer-inner { flex-direction: column; text-align: center; }
}

/* ===== SCROLL ANIMATIONS ===== */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }