/**
 * Arth Parkash ePaper - Brand Theme
 * Color palette extracted from logo: logo_new.png
 * Date: January 1, 2026
 */

:root {
    /* Primary Brand Colors (from logo) */
    --brand-orange: #FF6B00;        /* Sun element */
    --brand-red: #D32F2F;           /* Warm accent */
    --brand-dark: #212121;          /* Primary text */
    --brand-light-bg: #FFF8F0;      /* Warm neutral background */
    
    /* Extended Palette */
    --brand-orange-light: #FF8534;
    --brand-orange-dark: #E65100;
    --brand-gray: #424242;
    --brand-gray-light: #757575;
    
    /* Semantic Colors */
    --color-primary: var(--brand-orange);
    --color-secondary: var(--brand-red);
    --color-text: var(--brand-dark);
    --color-text-light: var(--brand-gray-light);
    --color-background: #FFFFFF;
    --color-surface: #FAFAFA;
    --color-border: #E0E0E0;
    
    /* Dark Mode Colors */
    --dark-bg: #1a1a1a;
    --dark-surface: #2d2d2d;
    --dark-border: #404040;
    --dark-text: #E0E0E0;
    --dark-text-secondary: #B0B0B0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-round: 50%;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-hindi: 'Noto Sans Devanagari', 'Mangal', sans-serif;
    --font-punjabi: 'Noto Sans Gurmukhi', 'Raavi', sans-serif;
}

/* ===========================
   GLOBAL STYLES
   =========================== */

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

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body[lang="hi"] {
    font-family: var(--font-hindi);
}

body[lang="pa"] {
    font-family: var(--font-punjabi);
}

/* ===========================
   HEADER & NAVIGATION
   =========================== */

.site-header {
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-red) 100%);
    padding: var(--spacing-sm) var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    height: 60px;
    width: auto;
    transition: transform 0.3s ease;
}

.site-logo:hover {
    transform: scale(1.05);
}

.site-nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: white;
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lang-btn.active {
    background: white;
    color: var(--brand-orange);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.dark-mode-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-orange-dark) 100%);
    color: white;
}

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

.btn-secondary {
    background: var(--brand-red);
    color: white;
}

.btn-secondary:hover {
    background: #B71C1C;
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--brand-orange);
    color: var(--brand-orange);
}

.btn-outline:hover {
    background: var(--brand-orange);
    color: white;
}

.btn-lg {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* ===========================
   CARDS
   =========================== */

.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.card-header {
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-red) 100%);
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

.card-body {
    padding: var(--spacing-md);
}

.card-footer {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

/* ===========================
   EDITION GRID
   =========================== */

.editions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.edition-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: pointer;
}

.edition-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.edition-thumbnail {
    width: 100%;
    height: 350px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--brand-light-bg) 0%, #FFE0B2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--brand-orange);
}

.edition-info {
    padding: var(--spacing-md);
}

.edition-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--brand-dark);
    margin-bottom: var(--spacing-xs);
}

.edition-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--brand-gray-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.edition-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
}

.category-badge {
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-red) 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===========================
   PDF VIEWER
   =========================== */

.pdf-viewer-container {
    background: var(--brand-dark);
    min-height: 100vh;
}

.pdf-toolbar {
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-red) 100%);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
}

.pdf-controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.pdf-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.pdf-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

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

.page-info {
    color: white;
    font-weight: 600;
    padding: 0 var(--spacing-sm);
}

#pdf-canvas {
    display: block;
    margin: var(--spacing-lg) auto;
    box-shadow: var(--shadow-lg);
    max-width: 100%;
}

/* ===========================
   ADMIN PANEL
   =========================== */

.admin-sidebar {
    background: var(--brand-dark);
    color: white;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.admin-logo {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.admin-menu {
    list-style: none;
}

.admin-menu-item {
    margin-bottom: var(--spacing-sm);
}

.admin-menu-link {
    color: white;
    text-decoration: none;
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.admin-menu-link:hover,
.admin-menu-link.active {
    background: var(--brand-orange);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--brand-orange);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-orange);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--brand-gray-light);
    font-size: 0.95rem;
}

/* ===========================
   DARK MODE
   =========================== */

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

body.dark-mode .card {
    background: var(--dark-surface);
    color: var(--dark-text);
}

body.dark-mode .edition-card {
    background: var(--dark-surface);
}

body.dark-mode .edition-title {
    color: var(--dark-text);
}

body.dark-mode .card-footer {
    background: var(--dark-bg);
    border-color: var(--dark-border);
}

body.dark-mode .site-logo {
    filter: brightness(1.2);
}

/* ===========================
   AD ZONES
   =========================== */

.ad-zone {
    background: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    text-align: center;
    margin: var(--spacing-md) 0;
}

.ad-zone-header {
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-red) 100%);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-md);
}

.ad-zone-sidebar {
    position: sticky;
    top: 80px;
}

.ad-zone-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 999;
}

.ad-zone-overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.ad-close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--brand-red);
    color: white;
    border: none;
    border-radius: var(--radius-round);
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-weight: bold;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

@media (max-width: 768px) {
    .site-header {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .site-logo {
        height: 40px;
    }
    
    .editions-grid {
        grid-template-columns: 1fr;
        padding: var(--spacing-sm);
    }
    
    .pdf-toolbar {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .site-nav {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

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

.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }