/* ============================================
   LnLy — Design System
   Glassmorphism + Developer-style Minimal UI
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(255, 255, 255, 0.15);
  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.6);
  --text-muted: rgba(240, 240, 245, 0.35);
  --accent: #6c5ce7;
  --accent-hover: #7c6ff7;
  --accent-glow: rgba(108, 92, 231, 0.25);
  --accent-soft: rgba(108, 92, 231, 0.1);
  --success: #00d2a0;
  --success-glow: rgba(0, 210, 160, 0.2);
  --error: #ff6b6b;
  --error-glow: rgba(255, 107, 107, 0.15);
  --warning: #ffc857;

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

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px var(--accent-glow);

  /* Glass */
  --glass-blur: blur(16px);
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: 1px solid var(--border-glass);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background gradient */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(108, 92, 231, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(0, 210, 160, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(108, 92, 231, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

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

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

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

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 1;
}

.container--wide {
  max-width: 960px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(10, 10, 15, 0.7);
  border-bottom: 1px solid var(--border-glass);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--text-secondary);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
}

/* ---------- Hero Section ---------- */
.hero {
  text-align: center;
  padding: var(--space-4xl) 0 var(--space-3xl);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: var(--space-xs) var(--space-md);
  border-radius: 50px;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border: 1px solid rgba(108, 92, 231, 0.15);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: var(--space-md);
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 50%, var(--success) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

/* ---------- Shortener Form ---------- */
.shortener-card {
  padding: var(--space-2xl);
}

.input-group {
  margin-bottom: var(--space-md);
  position: relative;
}

.input-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.3px;
}

.input-wrapper {
  position: relative;
}

.input-wrapper .icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.input-field {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 2.75rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.input-field::placeholder {
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.input-field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-field.error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px var(--error-glow);
}

.input-field.success {
  border-color: var(--success);
  box-shadow: 0 0 0 3px var(--success-glow);
}

.input-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.input-error {
  font-size: 0.75rem;
  color: var(--error);
  margin-top: var(--space-xs);
  display: none;
}

.input-error.visible {
  display: block;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.85rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0) scale(0.97);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-full {
  width: 100%;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-glass-hover);
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 0.55rem;
  border-radius: var(--radius-sm);
}

/* ---------- Result Card ---------- */
.result-section {
  margin-top: var(--space-xl);
  display: none;
}

.result-section.visible {
  display: block;
  animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-card {
  padding: var(--space-xl);
  text-align: left;
}

.result-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.result-label svg {
  width: 16px;
  height: 16px;
}

.result-url-box {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.75rem;
  margin-bottom: var(--space-md);
}

.result-url {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  word-break: break-all;
  min-width: 0;
}

.result-actions {
  display: flex;
  gap: var(--space-sm);
}

.copy-btn, .open-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.5rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.copy-btn:hover, .open-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-glass-hover);
}

.copy-btn:active, .open-btn:active {
  transform: scale(0.95);
}

.copy-btn.copied {
  background: var(--success-glow);
  border-color: var(--success);
  color: var(--success);
}

.copy-btn svg, .open-btn svg {
  width: 14px;
  height: 14px;
}

/* ---------- Alert Messages ---------- */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: var(--space-md);
  display: none;
  align-items: center;
  gap: var(--space-sm);
  animation: slideUp 0.3s ease;
}

.alert.visible {
  display: flex;
}

.alert-error {
  background: var(--error-glow);
  border: 1px solid rgba(255, 107, 107, 0.3);
  color: var(--error);
}

.alert-success {
  background: var(--success-glow);
  border: 1px solid rgba(0, 210, 160, 0.3);
  color: var(--success);
}

.alert svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ---------- Trust Section ---------- */
.trust-section {
  padding: var(--space-3xl) 0;
}

.trust-section h2 {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-2xl);
  letter-spacing: -0.3px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.trust-item {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
}

.trust-item .trust-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--space-md);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  transition: transform var(--transition-base);
}

.trust-item:hover .trust-icon {
  transform: scale(1.08);
}

.trust-item .trust-icon svg {
  width: 22px;
  height: 22px;
}

.trust-item h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.trust-item p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- How It Works ---------- */
.how-section {
  padding: var(--space-3xl) 0;
}

.how-section h2 {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-2xl);
  letter-spacing: -0.3px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.step-card {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(108, 92, 231, 0.15);
  margin-bottom: var(--space-sm);
  line-height: 1;
}

.step-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.step-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-glass);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

/* ---------- Loading Spinner ---------- */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ---------- Animations ---------- */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

  .trust-grid,
  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .trust-item,
  .step-card {
    padding: var(--space-lg) var(--space-md);
  }

  .shortener-card {
    padding: var(--space-lg);
  }

  .result-url-box {
    flex-direction: column;
    align-items: stretch;
  }

  .result-actions {
    justify-content: stretch;
  }

  .result-actions .copy-btn,
  .result-actions .open-btn {
    flex: 1;
    justify-content: center;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  /* Mobile nav */
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-glass);
    padding: var(--space-md) var(--space-lg);
    gap: var(--space-md);
  }

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

  .menu-toggle {
    display: block;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.65rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .glass-card {
    padding: var(--space-lg);
  }
}