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

:root {
  --bg:          #0a0a0f;
  --bg-alt:      #0f0f18;
  --surface:     #13131e;
  --border:      #1e1e2e;
  --text:        #e2e2f0;
  --text-muted:  #6b6b8a;
  --accent:      #7b68ee;
  --accent-dim:  rgba(123, 104, 238, 0.12);
  --accent-glow: rgba(123, 104, 238, 0.25);

  --font-display: 'Syne', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius:   6px;
  --nav-h:    64px;
  --ease:     cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; }

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

/* ─── Typography ───────────────────────────────────────── */
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; }

.mono { font-family: var(--font-mono); font-size: 0.85rem; }

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

/* ─── Layout ───────────────────────────────────────────── */
.container        { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
.container-narrow { max-width: 680px;  margin: 0 auto; padding: 0 2rem; text-align: center; }

.section     { padding: 7rem 0; }
.section-alt { background: var(--bg-alt); }

/* ─── Navigation ───────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2.5rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s, backdrop-filter 0.3s;
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.88);
  backdrop-filter: blur(16px);
  border-color: var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  list-style: none;
  display: flex; gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--text); border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─── Hero ─────────────────────────────────────────────── */
.hero {
  min-height: 100svh;
  display: flex; align-items: center;
  padding: calc(var(--nav-h) + 4rem) 2.5rem 4rem;
  position: relative; overflow: hidden;
}

.hero-content { max-width: 640px; position: relative; z-index: 1; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.7s var(--ease) 0.1s forwards;
}

.hero-name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fadeUp 0.7s var(--ease) 0.2s forwards;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  opacity: 0;
  animation: fadeUp 0.7s var(--ease) 0.3s forwards;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.7s var(--ease) 0.4s forwards;
}

.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s var(--ease) 0.5s forwards;
}

/* Dot grid decoration */
.hero-decoration {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}
.hero-grid {
  position: absolute;
  right: -4rem; top: 50%; transform: translateY(-50%);
  width: 520px; height: 520px;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  opacity: 0.5;
}

/* ─── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.2s var(--ease), box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover { box-shadow: 0 4px 24px var(--accent-glow); }

.btn-ghost {
  background: var(--accent-dim);
  color: var(--accent);
}
.btn-ghost:hover { background: rgba(123, 104, 238, 0.2); }

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-outline:hover { color: var(--text); border-color: var(--text-muted); }

.btn-large { padding: 0.9rem 2.2rem; font-size: 0.9rem; }

/* ─── Section Labels ───────────────────────────────────── */
.section-label {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 2rem;
}
.label-line {
  display: block; width: 32px; height: 1px;
  background: var(--accent);
}
.label-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

/* ─── About ────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  line-height: 1.75;
}
.about-text .btn { margin-top: 0.5rem; }

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

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex; flex-direction: column; gap: 0.35rem;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.04em;
  line-height: 1;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ─── Projects ─────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.project-placeholder {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 4rem 2rem;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  grid-column: 1 / -1;
  transition: border-color 0.2s;
}
.project-placeholder:hover { border-color: var(--text-muted); }

/* Project card template (for future use) */
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex; flex-direction: column; gap: 1rem;
  transition: border-color 0.25s, transform 0.25s var(--ease), box-shadow 0.25s;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.project-card-title { font-size: 1.15rem; font-weight: 700; color: var(--text); }
.project-card-desc  { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }
.project-card-tags  { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: auto; }
.project-card-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
}
.project-card-links { display: flex; gap: 1rem; }
.project-card-links a { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.project-card-links a:hover { color: var(--text); }

/* ─── Skills ───────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 2rem;
  margin-top: 1rem;
}

.skill-group-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.skill-list { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; }

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
  transition: color 0.2s, border-color 0.2s;
}
.skill-tag:hover { color: var(--text); border-color: var(--text-muted); }

/* ─── Contact ──────────────────────────────────────────── */
.social-links {
  display: flex; gap: 2rem; justify-content: center;
  margin-top: 2.5rem;
}
.social-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.social-link:hover { color: var(--text); }

/* ─── Footer ───────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
}
.footer .container {
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text-muted);
}

/* ─── Animations ───────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: center; gap: 2rem;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(16px);
    padding: 2rem;
    transform: translateY(-120%);
    transition: transform 0.4s var(--ease);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }

  .hero { padding: calc(var(--nav-h) + 3rem) 1.5rem 3rem; }
  .hero-grid { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }

  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-stats { grid-template-columns: 1fr 1fr; }

  .section { padding: 5rem 0; }
  .footer .container { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 480px) {
  .about-stats { grid-template-columns: 1fr; }
}