/* bbotir.xyz — 2026 portfolio. Modern type, glow, motion. */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #0a0a0f;
  --bg-mesh: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(120, 80, 255, 0.08), transparent),
             radial-gradient(ellipse 60% 40% at 100% 50%, rgba(0, 212, 255, 0.04), transparent),
             radial-gradient(ellipse 50% 30% at 0% 80%, rgba(255, 100, 120, 0.03), transparent);
  --bg-elevated: rgba(18, 18, 24, 0.7);
  --bg-card: rgba(24, 24, 32, 0.6);
  --bg-card-hover: rgba(32, 32, 44, 0.8);
  --text: #f0f0f5;
  --text-muted: #8888a0;
  --accent: #00d4ff;
  --accent-warm: #ff6b9d;
  --accent-soft: rgba(0, 212, 255, 0.12);
  --accent-glow: 0 0 40px rgba(0, 212, 255, 0.15);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(0, 212, 255, 0.25);
  --success: #22c55e;
  --error: #ef4444;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition: 0.25s var(--ease-out);
  --transition-slow: 0.4s var(--ease-out);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  background-image: var(--bg-mesh);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  border-radius: var(--radius-pill);
  z-index: 1000;
  transition: top var(--transition);
}
.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.75rem;
}
.container--wide { max-width: 920px; }

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
}
.logo:hover { color: var(--accent); text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-pill);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

/* ----- Hero ----- */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
  letter-spacing: 0.04em;
  border: 1px solid rgba(0, 212, 255, 0.2);
  animation: fade-in 0.6s var(--ease-out);
}

.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin: 0 0 0.75rem;
  background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.85) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fade-in 0.6s var(--ease-out) 0.05s both;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  animation: fade-in 0.6s var(--ease-out) 0.1s both;
}

.hero .intro {
  font-size: 1.1rem;
  color: var(--text);
  max-width: 44ch;
  margin: 0 auto 2.5rem;
  opacity: 0.9;
  line-height: 1.75;
  animation: fade-in 0.6s var(--ease-out) 0.15s both;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  animation: fade-in 0.6s var(--ease-out) 0.2s both;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, #00a8cc 100%);
  color: var(--bg);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35);
}

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

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn--ghost:hover { color: var(--text); background: rgba(255,255,255,0.04); }

/* ----- Sections ----- */
.section {
  padding: 4.5rem 0;
}
.section--alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  margin-bottom: 2.5rem;
}

.section-head h2,
.section-head h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
  color: var(--text);
}
.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.0625rem;
}

/* ----- Skills (bento-style) ----- */
.skills-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto;
  }
}
@media (min-width: 900px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 1fr;
  }
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition);
}
.skill-group:hover {
  border-color: var(--border-hover);
  box-shadow: var(--accent-glow);
  transform: translateY(-2px);
}

.skill-group h3 {
  font-family: 'Syne', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 1rem;
}

.skill-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.skill-group li {
  padding: 0.35rem 0;
  color: var(--text);
  font-size: 1rem;
}
.skill-group li::before {
  content: '→ ';
  color: var(--accent);
  font-weight: 600;
  opacity: 0.8;
}

/* ----- Cards (projects) ----- */
.card-grid {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-decoration: none;
  color: inherit;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition), background var(--transition);
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--accent-glow);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}
.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--text);
}
.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition);
}
.card-arrow::after {
  content: ' →';
}
.card:hover .card-arrow { gap: 0.6rem; }

/* ----- Experience ----- */
.highlights {
  list-style: none;
  margin: 0;
  padding: 0;
}
.highlights li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 1rem;
  color: var(--text);
  font-size: 1.0625rem;
}
.highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-soft);
}

/* ----- Contact ----- */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.contact-links a:hover {
  color: var(--accent);
  border-color: var(--border-hover);
  background: var(--accent-soft);
}

/* Form */
.form-group {
  margin-bottom: 1.5rem;
}
.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-errors {
  color: var(--error);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.messages { margin-bottom: 1.5rem; }
.message {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  font-weight: 500;
}
.message.success {
  background: rgba(34, 197, 94, 0.12);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.25);
}
.message.error {
  background: rgba(239, 68, 68, 0.12);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* ----- Article ----- */
.article-back {
  margin-bottom: 1.5rem;
}
.article-back a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.article-back a:hover { color: var(--accent); background: var(--accent-soft); }

.article h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
}
.article .summary {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 2rem;
  line-height: 1.65;
}

.article h2 {
  font-family: 'Syne', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2.5rem 0 0.75rem;
  color: var(--text);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.article h2:first-of-type { margin-top: 0; }

.article .tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.5rem 0 1.5rem;
}
.article .tech-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  padding: 0.35rem 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.article figure {
  margin: 2rem 0;
}
.article figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.article figure figcaption {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

/* ----- Footer ----- */
.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.9375rem;
  color: var(--text-muted);
}
.site-footer a {
  color: var(--text-muted);
  text-decoration: none;
}
.site-footer a:hover { color: var(--accent); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Scroll reveal with optional stagger */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}
.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn:hover,
  .card:hover,
  .skill-group:hover { transform: none; }
  .reveal-on-scroll { opacity: 1; transform: none; }
  .reveal-on-scroll.is-visible { opacity: 1; transform: none; }
  .hero-badge, .hero h1, .hero .tagline, .hero .intro, .hero-ctas { animation: none; }
}