/* ── Custom Properties ── */
:root {
  --font: 'Inter', system-ui, sans-serif;
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e5e7eb;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
  --max-width: 960px;
}

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

/* ── Base ── */
html {
  scroll-behavior: smooth;
}

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

/* ── Container ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Sections ── */
section {
  padding: 5rem 0;
}

h1 {
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 2rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* ── Hero ── */
.hero {
  padding: 8rem 0 5rem;
  text-align: center;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-weight: 400;
}

.social-links {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow);
}

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

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

.btn-disabled {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--border);
  color: var(--text-muted);
  cursor: default;
}

/* ── Project Cards ── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.card-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  margin-bottom: 1rem;
}

.card-badge.live {
  background: #dcfce7;
  color: #166534;
}

.card-badge.soon {
  background: #fef3c7;
  color: #92400e;
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin-bottom: 1.5rem;
}

.tech-list li {
  font-size: 0.78rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9999px;
  color: var(--text-muted);
}

/* ── About / Skills ── */
.about-text {
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
}

.skill-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skill-category ul {
  list-style: none;
}

.skill-category li {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.25rem 0;
}

/* ── Contact ── */
.contact {
  text-align: center;
}

.contact p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.contact-links {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  section {
    padding: 3rem 0;
  }

  .hero {
    padding: 5rem 0 3rem;
  }

  .social-links,
  .contact-links {
    flex-direction: column;
    align-items: center;
  }
}