/* Theme System - CSS Variables for Dark/Light Mode */

:root {
  /* Light Theme Colors (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-gradient-start: #f0f9ff;
  --bg-gradient-end: #e0f2fe;

  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-muted: #94a3b8;

  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --border-dark: #cbd5e1;

  --card-bg: rgba(255, 255, 255, 0.95);
  --card-border: rgba(226, 232, 240, 0.5);
  --card-shadow: rgba(0, 0, 0, 0.1);

  --input-bg: #ffffff;
  --input-border: #e2e8f0;
  --input-focus: #3b82f6;

  --button-bg: #3b82f6;
  --button-hover: #2563eb;
  --button-text: #ffffff;

  --link-color: #3b82f6;
  --link-hover: #2563eb;

  --success-bg: #dcfce7;
  --success-text: #166534;
  --success-border: #86efac;

  --error-bg: #fee2e2;
  --error-text: #991b1b;
  --error-border: #fca5a5;

  --warning-bg: #fef3c7;
  --warning-text: #92400e;
  --warning-border: #fde047;

  --info-bg: #dbeafe;
  --info-text: #1e40af;
  --info-border: #93c5fd;

  --overlay-bg: rgba(0, 0, 0, 0.5);
  --modal-bg: #ffffff;

  --scrollbar-bg: #f1f5f9;
  --scrollbar-thumb: #cbd5e1;
  --scrollbar-thumb-hover: #94a3b8;

  --header-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --sidebar-bg: #ffffff;

  /* Transition speed */
  --theme-transition: 0.3s ease;
}

/* Dark Theme Colors */
:root.dark-mode {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-gradient-start: #1e293b;
  --bg-gradient-end: #0f172a;

  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-muted: #64748b;

  --border-color: #334155;
  --border-light: #475569;
  --border-dark: #1e293b;

  --card-bg: rgba(30, 41, 59, 0.95);
  --card-border: rgba(51, 65, 85, 0.5);
  --card-shadow: rgba(0, 0, 0, 0.3);

  --input-bg: #1e293b;
  --input-border: #334155;
  --input-focus: #60a5fa;

  --button-bg: #3b82f6;
  --button-hover: #2563eb;
  --button-text: #ffffff;

  --link-color: #60a5fa;
  --link-hover: #93c5fd;

  --success-bg: #14532d;
  --success-text: #86efac;
  --success-border: #166534;

  --error-bg: #7f1d1d;
  --error-text: #fca5a5;
  --error-border: #991b1b;

  --warning-bg: #713f12;
  --warning-text: #fde047;
  --warning-border: #92400e;

  --info-bg: #1e3a8a;
  --info-text: #93c5fd;
  --info-border: #1e40af;

  --overlay-bg: rgba(0, 0, 0, 0.7);
  --modal-bg: #1e293b;

  --scrollbar-bg: #1e293b;
  --scrollbar-thumb: #475569;
  --scrollbar-thumb-hover: #64748b;

  --header-bg: linear-gradient(135deg, #4338ca 0%, #6366f1 100%);
  --sidebar-bg: #1e293b;
}

/* Apply theme colors to body and common elements */
body {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: background-color var(--theme-transition),
    color var(--theme-transition);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 6px;
  transition: background var(--theme-transition);
}

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

/* Theme Toggle Button Styles */
.theme-toggle-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--theme-transition);
  box-shadow: 0 2px 8px var(--card-shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--card-shadow);
  border-color: var(--button-bg);
}

.theme-toggle-btn:active {
  transform: translateY(0);
}

.theme-toggle-btn .theme-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--text-primary);
}

.theme-toggle-btn .theme-icon-svg {
  width: 100%;
  height: 100%;
  transition: transform var(--theme-transition);
}

.theme-toggle-btn:hover .theme-icon-svg {
  transform: rotate(15deg) scale(1.1);
}

.theme-toggle-animate .theme-icon-svg {
  animation: themeToggleRotate 0.5s ease;
}

@keyframes themeToggleRotate {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(1.2);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}

/* Utility classes for themed elements */
.bg-primary {
  background-color: var(--bg-primary);
}

.bg-secondary {
  background-color: var(--bg-secondary);
}

.bg-tertiary {
  background-color: var(--bg-tertiary);
}

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

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

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

.border-color {
  border-color: var(--border-color);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: 0 4px 12px var(--card-shadow);
  transition: all var(--theme-transition);
}

.btn-primary {
  background-color: var(--button-bg);
  color: var(--button-text);
  transition: background-color var(--theme-transition);
}

.btn-primary:hover {
  background-color: var(--button-hover);
}

/* Input fields */
input,
textarea,
select {
  background-color: var(--input-bg);
  border-color: var(--input-border);
  color: var(--text-primary);
  transition: all var(--theme-transition);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--input-focus);
  outline: none;
}

/* Links */
a {
  color: var(--link-color);
  transition: color var(--theme-transition);
}

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

/* Alert/Message boxes */
.alert-success {
  background-color: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.alert-error {
  background-color: var(--error-bg);
  color: var(--error-text);
  border-color: var(--error-border);
}

.alert-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border-color: var(--warning-border);
}

.alert-info {
  background-color: var(--info-bg);
  color: var(--info-text);
  border-color: var(--info-border);
}

/* Modal/Overlay */
.modal-overlay {
  background: var(--overlay-bg);
}

.modal-content {
  background: var(--modal-bg);
  color: var(--text-primary);
}

/* Header */
header {
  background: var(--header-bg);
}

/* Sidebar */
.sidebar {
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
}

/* Smooth transitions for theme changes */
* {
  transition-property: background-color, border-color, color, fill, stroke;
  transition-duration: var(--theme-transition);
  transition-timing-function: ease;
}

/* Prevent transition on page load */
.preload * {
  transition: none !important;
}