/* ===== RESET & BASE ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --neon: #00ffaa;
  --neon-dim: #00cc88;
  --cyan: #00d4ff;
  --purple: #a855f7;
  --pink: #f472b6;
  --yellow: #fbbf24;
  --red: #ef4444;
  --text: #c9d1d9;
  --text-dim: #6b7280;
  --border: #1e293b;
  --glow: 0 0 10px var(--neon), 0 0 40px rgba(0, 255, 170, 0.15);
  --font: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --scanline-opacity: 0.08;
  --grid-opacity: 0.03;
  --header-bg: rgba(10, 14, 23, 0.9);
  --terminal-bg: rgba(17, 24, 39, 0.8);
}

[data-theme="light"] {
  --bg: #f0f2f5;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f9fa;
  --neon: #059669;
  --neon-dim: #047857;
  --cyan: #0284c7;
  --purple: #7c3aed;
  --pink: #db2777;
  --yellow: #d97706;
  --red: #dc2626;
  --text: #1e293b;
  --text-dim: #64748b;
  --border: #d1d5db;
  --glow: 0 1px 3px rgba(5, 150, 105, 0.2);
  --scanline-opacity: 0;
  --grid-opacity: 0.04;
  --header-bg: rgba(240, 242, 245, 0.9);
  --terminal-bg: rgba(255, 255, 255, 0.9);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Grid background */
body::before {
  content: '';
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background-image:
    linear-gradient(rgba(0, 255, 170, var(--grid-opacity)) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 170, var(--grid-opacity)) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* Scanline effect */
body::after {
  content: '';
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, var(--scanline-opacity)) 2px,
    rgba(0, 0, 0, var(--scanline-opacity)) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

.hidden {
  display: none !important;
}

/* ===== BOOT SCREEN ===== */
#boot-screen {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: var(--bg);
  z-index: 10000;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  font-size: 14px;
  color: var(--neon);
}

#boot-log p {
  margin-bottom: 4px;
  opacity: 0;
  animation: fadeIn 0.1s forwards;
}

#boot-cursor {
  animation: blink 0.6s infinite;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

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

/* ===== HEADER ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red { background: var(--red); }
.dot.yellow { background: var(--yellow); }
.dot.green { background: var(--neon); }

.terminal-title {
  color: var(--neon);
  font-weight: 700;
  font-size: 15px;
  text-shadow: var(--glow);
}

.terminal-stats {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-dim);
}

/* ===== MINI TERMINAL ===== */
#terminal-section {
  max-width: 1200px;
  margin: 24px auto 0;
  padding: 0 24px;
}

#terminal {
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  max-height: 180px;
  overflow-y: auto;
}

#terminal-output {
  margin-bottom: 8px;
}

.terminal-line {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.terminal-line.system {
  color: var(--text-dim);
}

.terminal-line.success {
  color: var(--neon);
}

.terminal-line.error {
  color: var(--red);
}

.terminal-line .cmd {
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 1px 6px;
  border-radius: 3px;
}

.terminal-line .user-cmd {
  color: var(--neon);
}

#terminal-input-line {
  display: flex;
  align-items: center;
}

.prompt {
  color: var(--neon);
  font-size: 13px;
  white-space: nowrap;
}

#terminal-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  caret-color: var(--neon);
}

#terminal-input::placeholder {
  color: var(--text-dim);
  opacity: 0.5;
}

/* ===== CATEGORY NAV ===== */
#category-nav {
  max-width: 1200px;
  margin: 24px auto 0;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-nav-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.cat-nav-btn:hover {
  border-color: var(--neon);
  color: var(--neon);
  text-shadow: 0 0 8px rgba(0, 255, 170, 0.4);
}

/* ===== FEATURED SECTION ===== */
#featured-section {
  max-width: 1200px;
  margin: 24px auto 0;
  padding: 0 24px;
}

.featured-card {
  border: 1px solid rgba(0, 255, 170, 0.3) !important;
  background: linear-gradient(135deg, var(--bg-card), rgba(5, 150, 105, 0.05)) !important;
  max-width: 500px;
}

.featured-card .project-name {
  color: var(--neon);
  text-shadow: 0 0 8px rgba(0, 255, 170, 0.3);
}

/* ===== CATEGORY SECTIONS ===== */
#categories-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

.category-section {
  margin-top: 40px;
  scroll-margin-top: 80px;
}

.category-header {
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--cyan), var(--purple));
  opacity: 0;
  transition: opacity 0.3s;
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 255, 170, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 255, 170, 0.1);
}

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

/* Glitch effect on hover */
.project-card:hover .project-name {
  animation: glitch 0.3s ease;
}

@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 1px); }
  40% { transform: translate(2px, -1px); }
  60% { transform: translate(-1px, -1px); }
  80% { transform: translate(1px, 1px); }
  100% { transform: translate(0); }
}

.project-icon {
  font-size: 32px;
  margin-bottom: 12px;
  display: block;
}

.project-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.project-desc {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 16px;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.project-tag {
  font-size: 11px;
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 2px 8px;
  border-radius: 10px;
}

.project-date {
  font-size: 11px;
  color: var(--text-dim);
}

/* ===== FOOTER ===== */
footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}

.glow {
  color: var(--neon);
  text-shadow: 0 0 8px rgba(0, 255, 170, 0.5);
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 16px;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 12px;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--neon);
  color: var(--neon);
}

/* Light mode card shadows */
[data-theme="light"] .project-card {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .project-card:hover {
  box-shadow: 0 8px 30px rgba(5, 150, 105, 0.12);
}

[data-theme="light"] #terminal {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] #boot-screen {
  background: var(--bg);
  color: var(--neon);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .terminal-bar {
    flex-wrap: wrap;
    padding: 12px 16px;
  }

  .terminal-stats {
    width: 100%;
    margin-left: 0;
    margin-top: 4px;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  #categories-container,
  #featured-section,
  #category-nav,
  #terminal-section {
    padding: 0 16px;
  }
}