/* ═══════════════════════════════════════════════════
   Q's Build Lab — Portfolio Stylesheet
   Dark terminal aesthetic, clean and hacker-proud.
   ═══════════════════════════════════════════════════ */

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

:root {
  /* Core palette */
  --bg-deep: #06080c;
  --bg-surface: #0c1018;
  --bg-card: #0f1520;
  --bg-elevated: #141c28;

  /* Accent — cyan/teal glow */
  --accent: #00e5bf;
  --accent-dim: #00e5bf60;
  --accent-glow: #00e5bf20;
  --accent-subtle: #00e5bf10;

  /* Secondary accent — warm amber */
  --accent2: #f59e0b;
  --accent2-dim: #f59e0b60;

  /* Text */
  --text-primary: #e2e8f0;
  --text-secondary: #8892a4;
  --text-muted: #4a5568;

  /* Borders */
  --border: #1a2332;
  --border-glow: #00e5bf30;

  /* Fonts */
  --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Spacing */
  --section-pad: clamp(4rem, 8vw, 8rem);
  --container-max: 1200px;

  /* Animation */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* ── Scanline Overlay ────────────────────────────── */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

/* ── Particles Canvas ────────────────────────────── */
#particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ── Container ───────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

/* ── Navigation ──────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0.75rem 0;
  transition: all 0.3s var(--ease-out);
  background: transparent;
}

.nav.scrolled {
  background: rgba(6, 8, 12, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.blink {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: 0.02em;
}

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

.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: 2px;
  background: var(--text-secondary);
  transition: all 0.3s;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(6, 8, 12, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }

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

  .nav-toggle {
    display: flex;
  }
}

/* ── Hero ────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 6rem 2rem 4rem;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.5rem 1.25rem;
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

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

.typing-text {
  color: var(--text-primary);
}

.cursor {
  color: var(--accent);
  animation: blink 0.8s step-end infinite;
  font-size: 0.85em;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
}

.title-line {
  display: block;
  color: var(--text-primary);
}

.title-line.accent {
  background: linear-gradient(135deg, var(--accent), #00b4d8, var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3vw, 1.35rem);
  color: var(--accent2);
  letter-spacing: 0.15em;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.highlight {
  color: var(--accent);
  font-weight: 500;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: clamp(2rem, 6vw, 4rem);
  margin-bottom: 3rem;
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  background: transparent;
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: all 0.3s var(--ease-out);
}

.hero-cta:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-1px);
}

.hero-cta svg {
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(3px); }
}

.hero-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
}

/* ── Sections ────────────────────────────────────── */
.section {
  padding: var(--section-pad) 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: var(--bg-surface);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ── Project Cards Grid ──────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.5rem;
}

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

/* ── Card ────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  padding: 1px;
  pointer-events: none;
  background: linear-gradient(135deg, var(--accent-dim), transparent 40%, transparent 60%, var(--accent-dim));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s;
}

.card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 229, 191, 0.08), 0 0 1px var(--accent-dim);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-icon {
  font-size: 2rem;
  line-height: 1;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border-radius: 10px;
  flex-shrink: 0;
}

.card-meta {
  flex: 1;
  min-width: 0;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.card-loc {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
  border: 1px solid var(--border);
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.card-features {
  list-style: none;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.card-features li {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.5;
}

.card-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}

/* ── Card Output (terminal window) ───────────────── */
.card-output {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.output-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.output-dots {
  display: flex;
  gap: 5px;
}

.output-dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: block;
}

.output-dots i:nth-child(1) { background: #ff5f57; }
.output-dots i:nth-child(2) { background: #febc2e; }
.output-dots i:nth-child(3) { background: #28c840; }

.output-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.output-code {
  padding: 0.875rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.55;
  color: var(--text-secondary);
  overflow-x: auto;
  white-space: pre;
}

.output-code code {
  font-family: inherit;
}

/* ── Card Footer ─────────────────────────────────── */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  transition: color 0.2s;
}

.card-link:hover {
  color: var(--accent);
}

.card-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ── Stack Grid ──────────────────────────────────── */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.stack-item {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all 0.3s var(--ease-out);
}

.stack-item:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.stack-icon {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.stack-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.stack-detail {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ── Philosophy Terminal ─────────────────────────── */
.philosophy {
  max-width: 640px;
  margin: 0 auto;
}

.philosophy-terminal {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.philosophy-content {
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.philosophy-content p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ph-prompt {
  color: var(--accent);
  margin-right: 0.25rem;
}

/* ── About ───────────────────────────────────────── */
.about-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
  }
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
  font-size: 1rem;
}

.about-text a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
  transition: border-color 0.2s;
}

.about-text a:hover {
  border-color: var(--accent);
}

.about-links {
  margin-top: 1.5rem;
}

.about-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.3s var(--ease-out);
}

.about-link:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--accent-subtle);
}

.about-ascii {
  display: flex;
  align-items: center;
}

.about-ascii pre {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.4;
  color: var(--accent);
  opacity: 0.6;
  white-space: pre;
}

/* ── Footer ──────────────────────────────────────── */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
}

.footer-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Animations ──────────────────────────────────── */

/* Fade in on scroll */
.card,
.stack-item,
.about-content,
.philosophy {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.card.visible,
.stack-item.visible,
.about-content.visible,
.philosophy.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger cards */
.card:nth-child(2) { transition-delay: 0.08s; }
.card:nth-child(3) { transition-delay: 0.16s; }
.card:nth-child(4) { transition-delay: 0.24s; }
.card:nth-child(5) { transition-delay: 0.32s; }
.card:nth-child(6) { transition-delay: 0.40s; }

.stack-item:nth-child(2) { transition-delay: 0.05s; }
.stack-item:nth-child(3) { transition-delay: 0.10s; }
.stack-item:nth-child(4) { transition-delay: 0.15s; }
.stack-item:nth-child(5) { transition-delay: 0.20s; }
.stack-item:nth-child(6) { transition-delay: 0.25s; }

/* ── Selection ───────────────────────────────────── */
::selection {
  background: var(--accent);
  color: var(--bg-deep);
}

/* ── Scrollbar ───────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}