/* =========================================
   1. VARIABLES & THEME DEFINITIONS
   ========================================= */

/* LIGHT MODE (Default) */
:root {
  /* Brand Colors */
  --primary: #E60023; /* Pinterest Red */
  --primary-hover: #ad081b;

  /* Backgrounds */
  --bg-body: #f8f9fa;
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --sidebar-bg: #ffffff;

  /* Text */
  --text-main: #111111;
  --text-muted: #6c757d;
  
  /* Borders & Separators */
  --border-color: #e9ecef;
  --input-border: #ced4da;

  /* Table */
  --table-bg: transparent;
  --table-border: #dee2e6;
  --table-hover-bg: rgba(0, 0, 0, 0.075);
  --table-striped-bg: rgba(0, 0, 0, 0.05);

  /* Alerts (Bootstrap Default Mapped) */
  --alert-info-bg: #cff4fc;
  --alert-info-text: #055160;
  --alert-info-border: #b6effb;

  /* Dimensions */
  --sidebar-width: 250px;
  --header-height: 60px;
  --radius: 16px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
}

/* DARK MODE */
[data-theme="dark"] {
  /* Backgrounds */
  --bg-body: #121212;
  --bg-card: #1e1e1e;
  --bg-input: #2c2c2c;
  --sidebar-bg: #1e1e1e;

  /* Text */
  --text-main: #e0e0e0;
  --text-muted: #b0b0b0; /* Lighter for better readability on dark */
  
  /* Borders & Separators */
  --border-color: #2d2d2d;
  --input-border: #404040;

  /* Table */
  --table-bg: transparent;
  --table-border: #373b3e;
  --table-hover-bg: rgba(255, 255, 255, 0.075);
  --table-striped-bg: rgba(255, 255, 255, 0.05);

  /* Alerts (Dark Optimized) */
  --alert-info-bg: rgba(13, 202, 240, 0.15);
  --alert-info-text: #0dcaf0;
  --alert-info-border: rgba(13, 202, 240, 0.25);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
}

/* =========================================
   2. GLOBAL STYLES
   ========================================= */

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

a {
  text-decoration: none;
  color: var(--text-main);
}

/* Force Bootstrap utilities to respect variables */
.text-muted {
  color: var(--text-muted) !important;
}

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

.bg-light {
  background-color: var(--bg-body) !important;
}

/* =========================================
   3. LAYOUT
   ========================================= */

.app-wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  position: fixed;
  height: 100vh;
  z-index: 1000;
  padding: 1.5rem;
  transition: background-color 0.3s ease;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 2rem;
  width: calc(100% - var(--sidebar-width));
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  .main-content {
    margin-left: 0;
    width: 100%;
    padding: 1rem;
    padding-top: calc(var(--header-height) + 1rem);
  }
}

.mobile-header {
  display: none;
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
}

@media (max-width: 768px) {
  .mobile-header {
    display: flex;
  }
}

/* =========================================
   4. COMPONENTS
   ========================================= */

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  color: var(--text-main);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Buttons */
.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  border-radius: 24px;
  padding: 0.5rem 1.5rem;
  font-weight: 600;
}

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

/* Navigation */
.nav-link {
  color: var(--text-muted);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.nav-link:hover, .nav-link.active {
  background-color: rgba(230, 0, 35, 0.1);
  color: var(--primary);
}

.nav-link i {
  width: 20px;
  text-align: center;
}

/* Forms */
.form-control, .form-select {
  background-color: var(--bg-input);
  border-color: var(--input-border);
  color: var(--text-main);
  border-radius: 12px;
  padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
  background-color: var(--bg-card);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(230, 0, 35, 0.1);
  color: var(--text-main);
}

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

.form-control::file-selector-button {
  background-color: var(--bg-body);
  color: var(--text-main);
  border-color: var(--border-color);
}

/* Tables */
.table {
  color: var(--text-main);
  border-color: var(--table-border);
  --bs-table-bg: var(--table-bg);
  --bs-table-striped-bg: var(--table-striped-bg);
  --bs-table-hover-bg: var(--table-hover-bg);
}

.table thead th {
  background-color: var(--bg-card);
  border-bottom: 2px solid var(--border-color);
  color: var(--text-main);
}

.table td, .table th {
  border-bottom-color: var(--border-color);
}

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

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.pin-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 2/3;
  background-color: var(--border-color);
}

.pin-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pin-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: opacity 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pin-card:hover .pin-overlay {
  opacity: 1;
}

/* Theme Toggle Button */
.theme-toggle {
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background 0.2s;
  color: var(--text-main);
}

.theme-toggle:hover {
  background: var(--border-color);
}