/* ============ Reset & base ============ */
:root {
  --bg: #0b0c10;
  --bg-alt: #121319;
  --surface: #17181f;
  --border: #262832;
  --text: #f4f4f6;
  --text-muted: #9a9ba6;
  --accent: #6c5ce7;
  --accent-2: #00d3aa;
  --radius: 14px;
  --max-width: 1160px;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", var(--font-body);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
  font-weight: 600;
}

p { margin: 0 0 1em; color: var(--text-muted); }

ul { margin: 0; padding: 0; list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent-2);
  font-weight: 600;
  margin-bottom: 0.9em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.85em 1.6em;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); background: #7d6cf0; }

.btn-outline {
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); transform: translateY(-2px); }

/* ============ Skip link ============ */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  z-index: 999;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
}

/* ============ Header / Nav ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 12, 16, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.nav-links a[aria-current="page"] {
  color: var(--text);
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 96px;
  padding: 40px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

.footer-inner p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

.social-links {
  display: flex;
  gap: 20px;
}

.social-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.social-links a:hover { color: var(--accent-2); }

/* ============ Hero (home) ============ */
.hero {
  padding: 96px 24px 64px;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  margin-bottom: 0.4em;
}

.hero h1 em {
  color: var(--accent);
  font-style: normal;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 1.6em;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1;
  border-radius: 24px;
  background: linear-gradient(155deg, var(--surface), var(--bg-alt));
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-visual .ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
}
.hero-visual .ring.r1 { width: 70%; height: 70%; }
.hero-visual .ring.r2 { width: 45%; height: 45%; border-color: var(--accent); }

.hero-visual .initials {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--text);
  z-index: 1;
}

/* ============ Section shared ============ */
.section {
  padding: 72px 24px;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-head h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }

/* ============ Skills / stats (home) ============ */
.stats-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.stat-card .num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-2);
}

.stat-card p { margin: 0; font-size: 0.9rem; }

/* ============ Portfolio grid ============ */
.filter-bar {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.filter-btn:hover { border-color: var(--accent); color: var(--text); }
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.portfolio-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.project-thumb {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--bg-alt), var(--surface));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.project-body { padding: 20px; }

.project-body h3 { margin-bottom: 0.3em; font-size: 1.1rem; }

.tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6em;
}

/* ============ About page ============ */
.about-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.about-photo {
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  background: linear-gradient(155deg, var(--surface), var(--bg-alt));
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--text-muted);
}

.timeline {
  margin-top: 32px;
  border-left: 2px solid var(--border);
  padding-left: 24px;
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline-item h4 { margin-bottom: 0.2em; }
.timeline-item .meta { color: var(--accent-2); font-size: 0.85rem; margin-bottom: 0.4em; display: block; }

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.skills-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============ Contact page ============ */
.contact-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.contact-info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.contact-info-card .info-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}

.contact-info-card .info-row span:first-child {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  margin-bottom: 4px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.92rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.form-status {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--accent-2);
}

/* ============ Responsive ============ */
@media (max-width: 860px) {
  .hero-inner,
  .about-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero-visual { max-width: 340px; margin: 0 auto; order: -1; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 16px;
    display: none;
  }

  .nav-links.open { display: flex; }

  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-links a:last-child { border-bottom: none; }

  .nav-toggle { display: flex; }

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

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

  .footer-inner { flex-direction: column; text-align: center; }
}