/* ═══════════════════════════════════════════════════════════════
   VESNUX TOOLS - Design System
   Dark Theme + Gold Accent (Minimalis)
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
  /* Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: #141414;
  --bg-card-hover: #1c1c1c;
  
  --text-primary: #e5e5e5;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  
  --gold-primary: #c9a84c;
  --gold-secondary: #b89840;
  --gold-dark: #7a5a1a;
  --gold-glow: rgba(200, 150, 50, 0.3);
  
  --border-color: #2a2a2a;
  --border-hover: #3a3a3a;
  
  --success: #4ade80;
  --error: #f87171;
  --warning: #fbbf24;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  scroll-behavior: smooth;
}

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

/* ─── Layout ─── */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─── */
.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--space-lg);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-lg);
  text-decoration: none;
}

.sidebar-logo .logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-primary), var(--gold-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 0.1em;
}

.sidebar-logo .tools-badge {
  font-size: 0.65rem;
  background: var(--bg-tertiary);
  color: var(--gold-primary);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.nav-section {
  margin-bottom: var(--space-lg);
}

.nav-section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  padding-left: var(--space-sm);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-size: 0.9rem;
}

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

.nav-link.active {
  background: linear-gradient(135deg, rgba(200, 168, 76, 0.15), rgba(200, 168, 76, 0.05));
  color: var(--gold-primary);
  border: 1px solid rgba(200, 168, 76, 0.2);
}

.nav-link .icon {
  width: 18px;
  height: 18px;
  opacity: 0.7;
}

/* ─── Main Content ─── */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: var(--space-2xl);
  max-width: 900px;
}

/* ─── Page Header ─── */
.page-header {
  margin-bottom: var(--space-2xl);
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.page-header .subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ─── Tool Container ─── */
.tool-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

/* ─── Input Groups ─── */
.input-group {
  margin-bottom: var(--space-lg);
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.input-field {
  width: 100%;
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.input-field:focus {
  outline: none;
  border-color: var(--gold-primary);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

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

textarea.input-field {
  min-height: 150px;
  resize: vertical;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-primary), var(--gold-secondary));
  color: #0a0a0a;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--gold-glow);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-icon {
  padding: var(--space-md);
  aspect-ratio: 1;
}

/* ─── Output Area ─── */
.output-area {
  position: relative;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  min-height: 100px;
  word-break: break-all;
  white-space: pre-wrap;
}

.output-area.empty {
  color: var(--text-muted);
  font-style: italic;
}

.copy-btn {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--gold-primary);
  color: #0a0a0a;
}

.copy-btn.copied {
  background: var(--success);
  color: #0a0a0a;
}

/* ─── Options Grid ─── */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.option-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.option-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--gold-primary);
  cursor: pointer;
}

.option-item label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
}

/* ─── Range Slider ─── */
.range-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.range-group input[type="range"] {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  background: var(--bg-tertiary);
  border-radius: 3px;
  outline: none;
}

.range-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--gold-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px var(--gold-glow);
}

.range-value {
  min-width: 50px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--gold-primary);
}

/* ─── Strength Meter ─── */
.strength-meter {
  display: flex;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.strength-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  transition: background var(--transition-fast);
}

.strength-bar.weak { background: var(--error); }
.strength-bar.medium { background: var(--warning); }
.strength-bar.strong { background: var(--success); }

.strength-text {
  font-size: 0.8rem;
  margin-top: var(--space-xs);
}

.strength-text.weak { color: var(--error); }
.strength-text.medium { color: var(--warning); }
.strength-text.strong { color: var(--success); }

/* ─── Tool Grid (Index Page) ─── */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-normal);
}

.tool-card:hover {
  border-color: var(--gold-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.tool-card .card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(200, 168, 76, 0.2), rgba(200, 168, 76, 0.05));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.tool-card .card-icon svg {
  width: 24px;
  height: 24px;
  color: var(--gold-primary);
}

.tool-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.tool-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ─── Breadcrumbs ─── */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: 0.85rem;
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--gold-primary);
}

.breadcrumbs .separator {
  color: var(--text-muted);
}

.breadcrumbs .current {
  color: var(--text-secondary);
}

/* ─── Mobile Sidebar Toggle ─── */
.mobile-menu-btn {
  display: none;
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  background: var(--gold-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 1000;
  box-shadow: 0 4px 12px var(--gold-glow);
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  color: #0a0a0a;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
    padding: var(--space-lg);
  }
  
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .options-grid {
    grid-template-columns: 1fr;
  }
  
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── Animations ─── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

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