/*
 * Base styles for erimali.com
 * Clean, modern, and responsive layout with light/dark themes.
 */

:root {
  --bg: #f7f8fa;
  --text: #1a1a1a;
  --muted: #4b5563;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #4f46e5;
  --accent-strong: #4338ca;
  --shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  --transition: 200ms ease;
  --section-gap: 120px;
}

/* Dark mode variables */
body.dark {
  --bg: #0f172a;
  --text: #f9fafb;
  --muted: #cbd5e1;
  --card: #111827;
  --border: #1f2937;
  --accent: #818cf8;
  --accent-strong: #6366f1;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  letter-spacing: 0.01em;
  scroll-behavior: smooth;
}

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

/* Global layout */
.section {
  padding: var(--section-gap) min(8vw, 120px);
  position: relative;
}

.section-header {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-lead {
  color: var(--muted);
  margin: 8px 0 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 10px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--text);
  letter-spacing: -0.01em;
}

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

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

/* Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  transition: padding 200ms ease, box-shadow 200ms ease, background 200ms ease;
  padding: 20px min(8vw, 120px);
}

.site-header.shrink {
  padding: 12px min(8vw, 120px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}

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

nav { flex: 1; }

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 10px;
  transition: background var(--transition), color var(--transition);
}

.nav-links a:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent-strong);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: 10px;
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  transition: border var(--transition);
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
}

.mode-toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  padding: 8px 12px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.mode-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.mode-toggle .sun { display: none; }
body.dark .mode-toggle .moon { display: none; }
body.dark .mode-toggle .sun { display: inline; }

/* Hero */
.hero {
  padding: 160px min(8vw, 120px) 120px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  gap: 48px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 50%),
              radial-gradient(circle at 80% 10%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 45%),
              radial-gradient(circle at 50% 80%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 50%);
  z-index: 0;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  margin: 12px 0;
}

.hero-subtitle {
  font-size: 18px;
  max-width: 680px;
  color: var(--muted);
}

.typing {
  font-weight: 700;
  color: var(--accent-strong);
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  min-height: 280px;
}

.hero-visual .orb {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 45%, #a5b4fc));
  filter: blur(0px);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 120px color-mix(in srgb, var(--accent) 55%, transparent);
  animation: float 7s ease-in-out infinite;
}

.hero-visual .grid {
  position: absolute;
  inset: 12%;
  border-radius: 24px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 60%, transparent), color-mix(in srgb, var(--accent) 10%, transparent));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
  background: var(--card);
  transition: transform var(--transition), box-shadow var(--transition), color var(--transition), border var(--transition), background var(--transition);
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #ffffff;
  box-shadow: 0 12px 30px color-mix(in srgb, var(--accent) 40%, transparent);
}

.btn.ghost {
  border-color: var(--border);
}

.btn.small {
  padding: 10px 14px;
  font-size: 14px;
  width: fit-content;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: inherit;
}

.btn.primary:hover {
  box-shadow: 0 16px 40px color-mix(in srgb, var(--accent) 50%, transparent);
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 18px;
  box-shadow: var(--shadow);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px color-mix(in srgb, var(--accent) 20%, transparent);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}

.card-body h3 { margin: 8px 0 6px; }
.card-body p { color: var(--muted); }

.pill {
  display: inline-block;
  padding: 6px 10px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-radius: 999px;
  color: var(--accent-strong);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.05em;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.about-text {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-highlights ul {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  display: grid;
  gap: 12px;
}

.about-highlights li { color: var(--muted); }

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}

.stat .number {
  display: block;
  font-size: 24px;
  font-weight: 700;
}

.stat .label {
  color: var(--muted);
  font-size: 13px;
}

/* Contact */
.contact-grid {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  align-items: center;
  box-shadow: var(--shadow);
}

.contact-links {
  display: grid;
  gap: 10px;
}

.contact-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: background var(--transition), transform var(--transition), border var(--transition);
}

.contact-link:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
  transform: translateY(-2px);
}

/* Footer */
.footer {
  padding: 32px min(8vw, 120px) 48px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.footer a:hover { color: var(--accent-strong); }

/* Animations */
@keyframes float {
  0%, 100% { transform: translate(-50%, -50%) translateY(0); }
  50% { transform: translate(-50%, -50%) translateY(-12px); }
}

.fade-in {
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 700ms ease forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive adjustments */
@media (max-width: 960px) {
  .site-header {
    padding: 16px min(6vw, 72px);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    flex-direction: column;
    width: calc(100% - 32px);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow);
    z-index: 10;
  }

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

  .nav-toggle { display: inline-flex; }

  nav { display: flex; justify-content: flex-end; }
}

@media (max-width: 720px) {
  :root { --section-gap: 80px; }
  .hero { padding-top: 140px; }
  .site-header { padding: 14px 18px; }
  .nav-links { top: 62px; }
}

/* Utility */
.orb, .grid, .card, .about-text, .stat, .contact-grid {
  will-change: transform, opacity;
}