/*
  =========================================
  MitraBooks ERP - Design Tokens & Themes
  =========================================
  CSS variables for consistent theming across all modules
  Supports dark and light modes with smooth transitions
  PWA-safe: zero external dependencies
*/

/* ============================================
   ROOT VARIABLES (Design System)
   ============================================ */
:root {
  /* Typography */
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;

  /* Spacing & Layout */
  --sidebar-width: 280px;
  --header-height: 80px;
  --border-radius-sm: 8px;
  --border-radius-md: 8px;
  --border-radius-lg: 8px;

  /* Transitions & Animations */
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);

  /* Color RGB values (for opacity usage) */
  --accent-rgb: 59, 130, 246;      /* Blue */
  --success-rgb: 16, 185, 129;     /* Emerald */
  --warning-rgb: 245, 158, 11;     /* Amber */
  --danger-rgb: 239, 68, 68;       /* Red */
}

/* ============================================
   DARK THEME (Default)
   ============================================ */
html[data-theme="dark"],
html:not([data-theme]) {
  /* Backgrounds */
  --bg-primary: #090c14;
  --bg-secondary: #0f1424;
  --bg-card: rgba(18, 25, 47, 0.65);
  --bg-sidebar: #0a0d18;
  --bg-input: #12182e;
  --bg-hover: rgba(255, 255, 255, 0.05);
  --bg-active: rgba(59, 130, 246, 0.1);

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --text-inverse: #0f172a;

  /* Borders */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(255, 255, 255, 0.12);
  --border-color-focus: rgba(59, 130, 246, 0.5);

  /* Semantic Colors */
  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-active: #1e40af;

  --success-color: #10b981;
  --success-hover: #34d399;

  --warning-color: #f59e0b;
  --warning-hover: #fbbf24;

  --danger-color: #ef4444;
  --danger-hover: #f87171;

  /* Effects */
  --glass-blur: blur(16px);
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --glow-opacity: 0.12;
  --overlay-opacity: 0.7;
}

/* ============================================
   LIGHT THEME
   ============================================ */
html[data-theme="light"] {
  /* Backgrounds */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-sidebar: #0f172a;
  --bg-input: #f1f5f9;
  --bg-hover: rgba(0, 0, 0, 0.04);
  --bg-active: rgba(37, 99, 235, 0.08);

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #f8fafc;

  /* Borders */
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(0, 0, 0, 0.12);
  --border-color-focus: rgba(37, 99, 235, 0.5);

  /* Semantic Colors */
  --accent-color: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-active: #1e3a8a;

  --success-color: #059669;
  --success-hover: #047857;

  --warning-color: #d97706;
  --warning-hover: #b45309;

  --danger-color: #dc2626;
  --danger-hover: #b91c1c;

  /* Effects */
  --glass-blur: blur(8px);
  --card-shadow: 0 10px 25px -5px rgba(148, 163, 184, 0.12);
  --glow-opacity: 0.05;
  --overlay-opacity: 0.5;
}

/* ============================================
   BASE ELEMENT STYLING
   ============================================ */

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.glass-panel {
  background: rgba(18, 25, 47, 0.65);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 16px;
}

.card-shadow {
  box-shadow: var(--card-shadow);
}

.glow {
  box-shadow: 0 0 12px rgba(var(--accent-rgb), var(--glow-opacity));
}

.glow-orange {
  box-shadow: 0 0 12px rgba(245, 158, 11, var(--glow-opacity));
}

.glow-green {
  box-shadow: 0 0 12px rgba(16, 185, 129, var(--glow-opacity));
}

/* ============================================
   BUTTON STYLES
   ============================================ */

.btn {
  font-family: var(--font-body);
  padding: 8px 16px;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

.btn-primary:active:not(:disabled) {
  background: var(--accent-active);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-color-hover);
}

.btn-danger {
  background: var(--danger-color);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.field,
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

label {
  font-weight: 500;
  font-size: 13px;
  color: var(--text-primary);
}

input,
textarea,
select {
  font-family: var(--font-body);
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 8px 12px;
  font-size: 14px;
  transition: var(--transition-smooth);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.1);
  background: var(--bg-input);
}

input:disabled,
textarea:disabled,
select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

textarea {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-body);
}

/* ============================================
   BADGES & PILLS
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  white-space: nowrap;
}

.badge-success {
  background: rgba(var(--success-rgb), 0.1);
  color: var(--success-color);
}

.badge-warning {
  background: rgba(var(--warning-rgb), 0.1);
  color: var(--warning-color);
}

.badge-danger {
  background: rgba(var(--danger-rgb), 0.1);
  color: var(--danger-color);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ============================================
   ALERTS & MESSAGES
   ============================================ */

.alert {
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  border-left: 4px solid;
  margin-bottom: 16px;
}

.alert-info {
  background: rgba(var(--accent-rgb), 0.05);
  border-left-color: var(--accent-color);
  color: var(--text-primary);
}

.alert-warning {
  background: rgba(var(--warning-rgb), 0.05);
  border-left-color: var(--warning-color);
  color: var(--text-primary);
}

.alert-danger {
  background: rgba(var(--danger-rgb), 0.05);
  border-left-color: var(--danger-color);
  color: var(--text-primary);
}

.alert-success {
  background: rgba(var(--success-rgb), 0.05);
  border-left-color: var(--success-color);
  color: var(--text-primary);
}

/* ============================================
   TEXT UTILITIES
   ============================================ */

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

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

.text-accent {
  color: var(--accent-color);
}

.text-success {
  color: var(--success-color);
}

.text-warning {
  color: var(--warning-color);
}

.text-danger {
  color: var(--danger-color);
}

.font-heading {
  font-family: var(--font-heading);
  font-weight: 600;
}

.font-bold {
  font-weight: 600;
}

.font-mono {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-slide-down {
  animation: slideDown 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ============================================
   SCROLLBAR STYLING
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 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-color-hover);
}

scrollbar-width: thin;
scrollbar-color: var(--border-color) var(--bg-secondary);