/* ===================================
   THEME SYSTEM - Multiple Professional Themes
   =================================== */

/* Theme 1: Default (Blue Gradient) - Original */
[data-theme="default"] {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #7c3aed;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --header-gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

/* Theme 2: Professional Dark */
[data-theme="professional-dark"] {
    --primary: #1e293b;
    --primary-dark: #0f172a;
    --secondary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --bg-light: #0f172a;
    --bg-white: #1e293b;
    --border-light: #334155;
    --border-medium: #475569;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --header-gradient: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

[data-theme="professional-dark"] body {
    background: #0f172a;
}

/* Theme 3: Minimalist */
[data-theme="minimalist"] {
    --primary: #000000;
    --primary-dark: #1a1a1a;
    --secondary: #333333;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-muted: #666666;
    --bg-light: #ffffff;
    --bg-white: #ffffff;
    --border-light: #e0e0e0;
    --border-medium: #cccccc;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.1);
    --header-gradient: linear-gradient(135deg, #000000 0%, #333333 100%);
}

[data-theme="minimalist"] body {
    background: #ffffff;
}

/* Theme 4: Corporate */
[data-theme="corporate"] {
    --primary: #003d82;
    --primary-dark: #002654;
    --secondary: #0066cc;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6a6a6a;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --border-light: #dde3ea;
    --border-medium: #c5cdd6;
    --shadow-sm: 0 1px 2px rgba(0, 61, 130, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(0, 61, 130, 0.12), 0 2px 4px -1px rgba(0, 61, 130, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 61, 130, 0.15), 0 4px 6px -2px rgba(0, 61, 130, 0.1);
    --header-gradient: linear-gradient(135deg, #003d82 0%, #0066cc 100%);
}

/* Theme 5: Creative/Modern */
[data-theme="creative"] {
    --primary: #f97316;
    --primary-dark: #ea580c;
    --secondary: #ec4899;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --bg-light: #fff7ed;
    --bg-white: #ffffff;
    --border-light: #fed7aa;
    --border-medium: #fdba74;
    --shadow-sm: 0 1px 2px rgba(249, 115, 22, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(249, 115, 22, 0.15), 0 2px 4px -1px rgba(249, 115, 22, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(249, 115, 22, 0.2), 0 4px 6px -2px rgba(249, 115, 22, 0.15);
    --header-gradient: linear-gradient(135deg, #f97316 0%, #ec4899 100%);
}

/* Theme 6: Tech/Hacker */
[data-theme="tech"] {
    --primary: #10b981;
    --primary-dark: #059669;
    --secondary: #14b8a6;
    --text-primary: #f0fdf4;
    --text-secondary: #bbf7d0;
    --text-muted: #86efac;
    --bg-light: #022c22;
    --bg-white: #064e3b;
    --border-light: #065f46;
    --border-medium: #047857;
    --shadow-sm: 0 1px 2px rgba(16, 185, 129, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(16, 185, 129, 0.25), 0 2px 4px -1px rgba(16, 185, 129, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(16, 185, 129, 0.3), 0 4px 6px -2px rgba(16, 185, 129, 0.25);
    --header-gradient: linear-gradient(135deg, #064e3b 0%, #047857 100%);
}

[data-theme="tech"] body {
    background: #022c22;
}

/* Theme 7: Elegant/Serif */
[data-theme="elegant"] {
    --primary: #854d0e;
    --primary-dark: #713f12;
    --secondary: #a16207;
    --text-primary: #292524;
    --text-secondary: #57534e;
    --text-muted: #78716c;
    --bg-light: #fef3c7;
    --bg-white: #fffbeb;
    --border-light: #fde68a;
    --border-medium: #fcd34d;
    --shadow-sm: 0 1px 2px rgba(133, 77, 14, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(133, 77, 14, 0.15), 0 2px 4px -1px rgba(133, 77, 14, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(133, 77, 14, 0.2), 0 4px 6px -2px rgba(133, 77, 14, 0.15);
    --header-gradient: linear-gradient(135deg, #854d0e 0%, #a16207 100%);
}

/* Theme 8: Warm/Orange */
[data-theme="warm"] {
    --primary: #dc2626;
    --primary-dark: #b91c1c;
    --secondary: #ea580c;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --bg-light: #fef2f2;
    --bg-white: #ffffff;
    --border-light: #fecaca;
    --border-medium: #fca5a5;
    --shadow-sm: 0 1px 2px rgba(220, 38, 38, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(220, 38, 38, 0.15), 0 2px 4px -1px rgba(220, 38, 38, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(220, 38, 38, 0.2), 0 4px 6px -2px rgba(220, 38, 38, 0.15);
    --header-gradient: linear-gradient(135deg, #dc2626 0%, #ea580c 100%);
}

/* Theme 9: Nature/Green */
[data-theme="nature"] {
    --primary: #16a34a;
    --primary-dark: #15803d;
    --secondary: #65a30d;
    --text-primary: #1a2e05;
    --text-secondary: #365314;
    --text-muted: #4d7c0f;
    --bg-light: #f7fee7;
    --bg-white: #ffffff;
    --border-light: #d9f99d;
    --border-medium: #bef264;
    --shadow-sm: 0 1px 2px rgba(22, 163, 74, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(22, 163, 74, 0.15), 0 2px 4px -1px rgba(22, 163, 74, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(22, 163, 74, 0.2), 0 4px 6px -2px rgba(22, 163, 74, 0.15);
    --header-gradient: linear-gradient(135deg, #16a34a 0%, #65a30d 100%);
}

/* Theme 10: Ocean/Teal */
[data-theme="ocean"] {
    --primary: #0891b2;
    --primary-dark: #0e7490;
    --secondary: #06b6d4;
    --text-primary: #083344;
    --text-secondary: #164e63;
    --text-muted: #155e75;
    --bg-light: #ecfeff;
    --bg-white: #ffffff;
    --border-light: #a5f3fc;
    --border-medium: #67e8f9;
    --shadow-sm: 0 1px 2px rgba(8, 145, 178, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(8, 145, 178, 0.15), 0 2px 4px -1px rgba(8, 145, 178, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(8, 145, 178, 0.2), 0 4px 6px -2px rgba(8, 145, 178, 0.15);
    --header-gradient: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
}

/* Theme 11: Sunset/Purple */
[data-theme="sunset"] {
    --primary: #9333ea;
    --primary-dark: #7e22ce;
    --secondary: #c026d3;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --bg-light: #faf5ff;
    --bg-white: #ffffff;
    --border-light: #e9d5ff;
    --border-medium: #d8b4fe;
    --shadow-sm: 0 1px 2px rgba(147, 51, 234, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(147, 51, 234, 0.15), 0 2px 4px -1px rgba(147, 51, 234, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(147, 51, 234, 0.2), 0 4px 6px -2px rgba(147, 51, 234, 0.15);
    --header-gradient: linear-gradient(135deg, #9333ea 0%, #c026d3 100%);
}

/* Theme 12: Monochrome */
[data-theme="monochrome"] {
    --primary: #404040;
    --primary-dark: #262626;
    --secondary: #525252;
    --text-primary: #171717;
    --text-secondary: #404040;
    --text-muted: #737373;
    --bg-light: #f5f5f5;
    --bg-white: #ffffff;
    --border-light: #e5e5e5;
    --border-medium: #d4d4d4;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --header-gradient: linear-gradient(135deg, #404040 0%, #525252 100%);
}

/* Theme Switcher UI */
.theme-switcher {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.theme-switcher-btn {
    background: var(--bg-white);
    border: 2px solid var(--border-medium);
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.theme-switcher-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.2);
}

.theme-panel {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: var(--bg-white);
    border: 2px solid var(--border-medium);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    width: 320px;
    max-height: 500px;
    overflow-y: auto;
    display: none;
}

.theme-panel.active {
    display: block;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.theme-panel-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-light);
}

.theme-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-light);
}

.theme-option:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.theme-option.active {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.theme-option.active .theme-preview {
    box-shadow: 0 0 0 2px white;
}

.theme-preview {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    flex-shrink: 0;
    display: flex;
    overflow: hidden;
}

.theme-preview-color {
    flex: 1;
}

.theme-info {
    flex: 1;
}

.theme-name {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.15rem;
}

.theme-description {
    font-size: 0.8rem;
    opacity: 0.8;
}

.theme-option.active .theme-description {
    opacity: 1;
}

/* Print-specific theme handling */
@media print {
    .theme-switcher {
        display: none !important;
    }
    
    /* Ensure themes print correctly */
    body {
        background: white !important;
    }
}

/* Mobile responsive */
@media (max-width: 768px) {
    .theme-switcher {
        bottom: 1rem;
        right: 1rem;
    }
    
    .theme-switcher-btn {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
    }
    
    .theme-panel {
        width: 280px;
        max-height: 400px;
        right: -230px;
    }
    
    .theme-panel.active {
        right: 0;
    }
}