/* =============================================
  main.css — PixieConverter Global Design System
  ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Custom Properties ─────────────────── */
:root {
  /* Colors */
  --color-bg:           #09090f;
  --color-surface:      #111827;
  --color-surface-2:    #1a2235;
  --color-surface-3:    #222d42;
  --color-border:       #1e2d4a;
  --color-border-light: #2a3f6a;

  /* Accents */
  --color-accent:       #6c63ff;
  --color-accent-dark:  #4f46e5;
  --color-accent-light: #a78bfa;
  --color-accent-glow:  rgba(108, 99, 255, 0.25);
  --color-accent-2:     #00d4ff;
  --color-accent-2-glow:rgba(0, 212, 255, 0.2);

  /* Status */
  --color-success:      #22c55e;
  --color-success-bg:   rgba(34, 197, 94, 0.1);
  --color-warning:      #f59e0b;
  --color-warning-bg:   rgba(245, 158, 11, 0.1);
  --color-error:        #ef4444;
  --color-error-bg:     rgba(239, 68, 68, 0.1);

  /* Text */
  --color-text-primary: #f0f4ff;
  --color-text-secondary:#b8c5e0;
  --color-text-muted:   #6b7fa3;
  --color-text-dim:     #3d5070;

  /* Typography */
  --font-family:        'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:          'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Border radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.5);
  --shadow-xl:  0 20px 60px rgba(0,0,0,0.6);
  --shadow-accent: 0 0 30px var(--color-accent-glow);
  --shadow-accent-2: 0 0 30px var(--color-accent-2-glow);

  /* Transitions */
  --transition-fast:  150ms ease;
  --transition-base:  250ms ease;
  --transition-slow:  400ms ease;

  /* Layout */
  --container-max:  1200px;
  --header-height:  68px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ─── Scrollbar ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background: var(--color-border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

/* ─── Layout Utilities ───────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ─── Typography ─────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }

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

/* ─── Header / Navbar ────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(9, 9, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  transition: opacity var(--transition-fast);
}

.logo:hover { opacity: 0.85; }

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 0 16px var(--color-accent-glow);
}

.logo-text span {
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-2);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* ─── Hero Section ───────────────────────────── */
.hero {
  position: relative;
  padding: var(--space-20) 0 var(--space-16);
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(108, 99, 255, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(0, 212, 255, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 20% 70%, rgba(108, 99, 255, 0.06) 0%, transparent 60%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.2;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 0%, transparent 80%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: rgba(108, 99, 255, 0.12);
  border: 1px solid rgba(108, 99, 255, 0.3);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
  animation: pulse-dot 2s ease infinite;
}

.hero h1 {
  margin-bottom: var(--space-5);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--space-10);
}

.hero-format-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.format-badge {
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid;
  transition: all var(--transition-fast);
}

.format-badge.webp  { color: #a78bfa; border-color: rgba(167,139,250,0.3); background: rgba(167,139,250,0.08); }
.format-badge.png   { color: #60a5fa; border-color: rgba(96,165,250,0.3);  background: rgba(96,165,250,0.08);  }
.format-badge.jpg   { color: #34d399; border-color: rgba(52,211,153,0.3);  background: rgba(52,211,153,0.08);  }
.format-badge.gif   { color: #f472b6; border-color: rgba(244,114,182,0.3); background: rgba(244,114,182,0.08); }
.format-badge.bmp   { color: #fb923c; border-color: rgba(251,146,60,0.3);  background: rgba(251,146,60,0.08);  }
.format-badge.avif  { color: #00d4ff; border-color: rgba(0,212,255,0.3);   background: rgba(0,212,255,0.08);   }
.format-badge.ico   { color: #fbbf24; border-color: rgba(251,191,36,0.3);  background: rgba(251,191,36,0.08);  }
.format-badge.svg   { color: #4ade80; border-color: rgba(74,222,128,0.3);  background: rgba(74,222,128,0.08);  }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ─── Main Converter Section ─────────────────── */
.converter-section {
  padding: 0 0 var(--space-20);
}

/* ─── Format Selector ────────────────────────── */
.format-selector-section {
  margin-bottom: var(--space-6);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.format-pills {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ─── Info Section ───────────────────────────── */
.info-section {
  padding: var(--space-20) 0;
  border-top: 1px solid var(--color-border);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-10);
}

/* ─── Format Pairs Table ─────────────────────── */
.pairs-section {
  padding: var(--space-16) 0;
  border-top: 1px solid var(--color-border);
}

.pairs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.pairs-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.pairs-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pair-badge {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  cursor: default;
}

.pair-badge:hover {
  color: var(--color-accent-light);
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
}

/* ─── Footer ─────────────────────────────────── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) 0;
  text-align: center;
}

.footer-privacy {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  background: var(--color-success-bg);
  border: 1px solid rgba(34,197,94,0.2);
  color: var(--color-success);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-5);
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover { color: var(--color-text-primary); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

/* ─── Responsive ─────────────────────────────── */
@media (max-width: 768px) {
  :root { --header-height: 60px; }
  .nav { display: none; }
  .pairs-grid { grid-template-columns: 1fr; }
  .hero { padding: var(--space-16) 0 var(--space-12); }
  .hero-stats { gap: var(--space-5); }
  .container { padding: 0 var(--space-4); }
}

@media (max-width: 480px) {
  .hero-format-badges { gap: var(--space-1); }
}