/* ==========================================================================
   MAIN.CSS - Core Design System, Variables, Dark Glassmorphism & Layout
   ========================================================================== */

:root {
  --bg-primary: #090D16;
  --bg-secondary: #0F172A;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.4);
  --border-active: rgba(129, 140, 248, 0.6);
  
  --text-main: #F8FAFC;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --accent-cyan: #38BDF8;
  --accent-indigo: #818CF8;
  --accent-emerald: #34D399;
  --accent-amber: #FBBF24;
  --accent-rose: #F43F5E;
  --accent-purple: #C084FC;
  
  --gradient-brand: linear-gradient(135deg, #38BDF8 0%, #818CF8 50%, #C084FC 100%);
  --gradient-emerald: linear-gradient(135deg, #10B981 0%, #34D399 100%);
  --gradient-amber: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
  --gradient-rose: linear-gradient(135deg, #E11D48 0%, #F43F5E 100%);
  --gradient-dark: linear-gradient(180deg, #090D16 0%, #0F172A 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.2);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  background-image: 
    radial-gradient(at 10% 15%, rgba(56, 189, 248, 0.08) 0px, transparent 50%),
    radial-gradient(at 90% 85%, rgba(129, 140, 248, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(192, 132, 252, 0.04) 0px, transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   RESPONSIVE OVERFLOW GUARDS
   Uzun kod va matematik formulalar tor ekranlarda sahifadan tashqariga
   chiqib ketmasligi uchun: har biri o'z ichida gorizontal suriladi,
   sahifaning o'zi esa hech qachon gorizontal skrollanmaydi (body'dagi
   overflow-x: hidden shu bilan birga ishlaydi).
   ========================================================================== */
pre, code {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* KaTeX tomonidan render qilingan formulalar (auto-render.min.js orqali) */
.katex-display {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px; /* pastki scrollbar formulaga yopishib qolmasin */
}

.katex {
  max-width: 100%;
  white-space: normal;
}

img, svg, canvas, video, table {
  max-width: 100%;
}

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

h1 { font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
p { color: var(--text-secondary); font-size: 1.05rem; }

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-cyan { color: var(--accent-cyan); }
.text-emerald { color: var(--accent-emerald); }
.text-amber { color: var(--accent-amber); }
.text-rose { color: var(--accent-rose); }
.text-purple { color: var(--accent-purple); }

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header .badge {
  display: inline-flex;
  margin-bottom: 14px;
}
.section-header h2 {
  margin-bottom: 12px;
}
.section-header p {
  max-width: 720px;
  margin: 0 auto;
}

/* Glass Card */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.glass-panel:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Grid katak <canvas>/<pre>/<img> kabi "replaced" elementlar tufayli
   torayolmay, sig'may qolishining oldini oladi (klassik Grid "blowout"):
   default min-width:auto o'rniga 0 qo'yiladi, shunda katak konteyner
   kengligiga moslashadi, ichidagi element esa o'zining overflow-x/
   max-width qoidasi bilan (yoki aspect-ratio bilan) siqiladi. */
.grid-2 > *, .grid-3 > *, .grid-4 > * {
  min-width: 0;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(1, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
  .glass-panel { padding: 20px; }
  p { font-size: 0.98rem; }
  .katex-display { font-size: 0.9em; }
}

@media (max-width: 480px) {
  .container { padding: 0 12px; }
  .glass-panel { padding: 14px; border-radius: var(--radius-md); }
  h1 { font-size: clamp(1.6rem, 7vw, 2.2rem); }
  h2 { font-size: clamp(1.3rem, 6vw, 1.7rem); }
  h3 { font-size: clamp(1.05rem, 5vw, 1.25rem); }
  p { font-size: 0.92rem; }
  .katex-display { font-size: 0.8em; }
  .katex { font-size: 0.95em; }
}

/* Uzun so'zlar/formulalar telefon ekranidan chiqib ketmasligi uchun */
p, li, td, th, dd, figcaption { overflow-wrap: break-word; }
.katex-display { overflow-x: auto; overflow-y: hidden; max-width: 100%; }
/* Bosma (chop etish va PDF) ko‘rinishi: navigatsiya yashiriladi, barcha tab bo‘limlari ochiladi */
@media print {
  body { background: #fff !important; color: #000 !important; }
  .navbar, .site-header, .mobile-drawer, .drawer-overlay, .hamburger-btn, .tabs-nav, .tabs-scroll-wrapper, .no-print { display: none !important; }
  .tab-content { display: block !important; }
  .glass-panel, .card, .hero-panel { background: #fff !important; box-shadow: none !important; backdrop-filter: none !important; -webkit-backdrop-filter: none !important; border: 1px solid #bbb !important; }
  h1, h2, h3, h4, h5, p, li, td, th, strong, em, span, label, a { color: #000 !important; }
  .text-gradient { background: none !important; -webkit-text-fill-color: #000 !important; color: #000 !important; }
  pre, code { background: #f4f4f4 !important; color: #000 !important; }
  canvas, video { max-width: 100% !important; }
}