/* ==========================================================================
   JackDao Personal Site — Main Stylesheet
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: transparent;
}

main,
footer {
  position: relative;
  z-index: 1;
}

/* Subtle Tech Grid + Radial Emerald Glow */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(to right, rgba(16, 185, 129, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 185, 129, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 10%, #000 40%, transparent 100%);
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 780px;
  height: 460px;
  z-index: -2;
  background: radial-gradient(circle, var(--accent-glow) 0%, rgba(16, 185, 129, 0.04) 45%, transparent 72%);
  filter: blur(40px);
  pointer-events: none;
}

.bg-wave-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(6, 9, 8, 0.78);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  color: var(--accent-cyber);
  font-size: 0.85rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s var(--ease-out);
}

.nav-links a:hover {
  color: var(--accent-bright);
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: 999px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.is-active {
  background: var(--accent-dim);
  color: var(--accent-cyber);
  box-shadow: inset 0 0 0 1px var(--border-accent);
}

/* Hero Section */
.hero {
  padding: 88px 0 64px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  color: var(--accent-bright);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyber);
  box-shadow: 0 0 10px var(--accent-cyber);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 2.05rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.hero-title .highlight {
  display: inline-block;
  font-size: clamp(2.98rem, 7.4vw, 5.08rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  background: linear-gradient(120deg, var(--accent-cyber) 0%, var(--accent-primary) 65%, #6ee7b7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  max-width: 660px;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 44px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out), border-color 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #059669);
  color: #03130d;
  border: 1px solid rgba(52, 211, 153, 0.5);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 245, 160, 0.25);
}

.btn-ghost {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

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

/* Terminal Card */
.terminal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.terminal-dots {
  display: flex;
  gap: 7px;
}

.terminal-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
}

.terminal-dots span:last-child {
  background: var(--accent-primary);
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text-secondary);
  overflow-x: auto;
}

.code-key { color: var(--accent-bright); }
.code-str { color: #a7f3d0; }
.code-bool { color: var(--accent-cyber); }
.code-comment { color: var(--text-muted); }

/* Section Layout */
.section {
  padding: 56px 0;
}

.section-header {
  margin-bottom: 32px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-bright);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Grid Cards */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  padding: 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out), background 0.25s;
}

.card:hover {
  border-color: var(--border-accent);
  background: var(--bg-elevated);
  transform: translateY(-3px);
}

.card-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  color: var(--accent-cyber);
  margin-bottom: 16px;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  margin-bottom: 16px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.card:hover .tag {
  border-color: rgba(16, 185, 129, 0.22);
  color: #d1fae5;
}

/* Principle List */
.principle-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyber);
  margin-bottom: 10px;
  display: block;
}

/* Footer */
.footer {
  margin-top: 40px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-bright);
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 840px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 56px 0 40px;
  }

  .nav-links {
    gap: 16px;
  }
}