/* ============================================
   SERAPHIM ACADEMY — GLOBAL STYLES
   ============================================ */

:root {
  --color-bg: #0a0d14;
  --color-bg-2: #0e1220;
  --color-bg-3: #12182a;
  --color-surface: #161d30;
  --color-surface-2: #1c2540;
  --color-border: #1e2d4a;
  --color-border-2: #253559;

  --color-primary: #00d4ff;
  --color-primary-dim: #00b8de;
  --color-primary-glow: rgba(0, 212, 255, 0.15);
  --color-secondary: #7c3aed;
  --color-accent: #00ff88;
  --color-accent-dim: #00cc6a;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  --color-text: #e2e8f0;
  --color-text-2: #94a3b8;
  --color-text-3: #64748b;
  --color-text-muted: #475569;

  --font-sans: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.2);
  --shadow-glow-accent: 0 0 20px rgba(0, 255, 136, 0.15);

  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
}

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

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dim);
}

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

code, pre {
  font-family: var(--font-mono);
}

pre {
  background: var(--color-bg-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.7;
}

code:not(pre code) {
  background: var(--color-surface);
  color: var(--color-accent);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

p {
  color: var(--color-text-2);
  margin-bottom: 1rem;
}

ul, ol {
  padding-left: 1.5rem;
}

li {
  color: var(--color-text-2);
  margin-bottom: 0.35rem;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 0.75rem 1.25rem;
  background: var(--color-surface);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
}

blockquote p {
  color: var(--color-text-2);
  margin: 0;
  font-style: italic;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

th {
  background: var(--color-surface-2);
  color: var(--color-primary);
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border);
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-2);
  font-size: 0.9rem;
}

tr:hover td {
  background: var(--color-surface);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-beginner {
  background: rgba(0, 255, 136, 0.12);
  color: var(--color-accent);
  border: 1px solid rgba(0, 255, 136, 0.25);
}

.badge-intermediate {
  background: rgba(245, 158, 11, 0.12);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-advanced {
  background: rgba(239, 68, 68, 0.12);
  color: var(--color-danger);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-primary {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  font-family: var(--font-sans);
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: #000;
}

.btn-primary:hover {
  background: var(--color-primary-dim);
  color: #000;
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-2);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-2);
}

.scan-line {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  z-index: 9999;
  pointer-events: none;
}

.grid-dots {
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 28px 28px;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes slide-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-slide-up {
  animation: slide-in-up 0.5s ease forwards;
}

.animate-fade-in {
  animation: fade-in 0.4s ease forwards;
}

::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border-2);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

::selection {
  background: var(--color-primary-glow);
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .container, .container-narrow {
    padding: 0 1rem;
  }
}