/* Theme System - Professional Dark Themes with Gradients */

/* Default Light Theme */
:root {
    --theme-name: 'light';
}

/* Professional Dark Blue Theme */
[data-theme="light"] {
    --bg-primary: linear-gradient(135deg, #1e3a5f 0%, #2d4a6b 50%, #1a2f4a 100%);
    --header-bg: linear-gradient(135deg, rgba(45, 74, 107, 0.85) 0%, rgba(30, 58, 95, 0.85) 100%);
    --card-bg: linear-gradient(135deg, rgba(45, 74, 107, 0.75) 0%, rgba(30, 58, 95, 0.75) 100%);
    --card-border: rgba(100, 181, 246, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #b3d9ff;
    --tab-bg: linear-gradient(135deg, rgba(45, 74, 107, 0.8) 0%, rgba(30, 58, 95, 0.8) 100%);
    --tab-border: rgba(100, 181, 246, 0.5);
    --tab-active: linear-gradient(135deg, #64b5f6 0%, #42a5f5 50%, #1e88e5 100%);
    --meeting-bg: linear-gradient(135deg, rgba(30, 58, 95, 0.7) 0%, rgba(26, 47, 74, 0.7) 100%);
    --meeting-border: rgba(100, 181, 246, 0.4);
    --chat-bg: linear-gradient(135deg, rgba(26, 47, 74, 0.6) 0%, rgba(21, 36, 53, 0.6) 100%);
    --input-bg: rgba(30, 58, 95, 0.6);
    --btn-primary: linear-gradient(135deg, #42a5f5 0%, #1e88e5 50%, #1565c0 100%);
    --btn-danger: linear-gradient(135deg, #ef5350 0%, #e53935 50%, #c62828 100%);
    --btn-success: linear-gradient(135deg, #66bb6a 0%, #43a047 50%, #2e7d32 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(100, 181, 246, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(100, 181, 246, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glow: 0 0 20px rgba(100, 181, 246, 0.3);
}

/* Professional Dark Purple Theme */
[data-theme="dark"] {
    --bg-primary: linear-gradient(135deg, #2d1b4e 0%, #3d2766 50%, #1f1333 100%);
    --header-bg: linear-gradient(135deg, rgba(61, 39, 102, 0.85) 0%, rgba(45, 27, 78, 0.85) 100%);
    --card-bg: linear-gradient(135deg, rgba(61, 39, 102, 0.75) 0%, rgba(45, 27, 78, 0.75) 100%);
    --card-border: rgba(186, 104, 200, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #e1bee7;
    --tab-bg: linear-gradient(135deg, rgba(61, 39, 102, 0.8) 0%, rgba(45, 27, 78, 0.8) 100%);
    --tab-border: rgba(186, 104, 200, 0.5);
    --tab-active: linear-gradient(135deg, #ba68c8 0%, #ab47bc 50%, #8e24aa 100%);
    --meeting-bg: linear-gradient(135deg, rgba(45, 27, 78, 0.7) 0%, rgba(31, 19, 51, 0.7) 100%);
    --meeting-border: rgba(186, 104, 200, 0.4);
    --chat-bg: linear-gradient(135deg, rgba(31, 19, 51, 0.6) 0%, rgba(21, 13, 34, 0.6) 100%);
    --input-bg: rgba(45, 27, 78, 0.6);
    --btn-primary: linear-gradient(135deg, #ab47bc 0%, #8e24aa 50%, #6a1b9a 100%);
    --btn-danger: linear-gradient(135deg, #ef5350 0%, #e53935 50%, #c62828 100%);
    --btn-success: linear-gradient(135deg, #66bb6a 0%, #43a047 50%, #2e7d32 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(186, 104, 200, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(186, 104, 200, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glow: 0 0 20px rgba(186, 104, 200, 0.3);
}

/* Professional Dark Teal Theme */
[data-theme="ocean"] {
    --bg-primary: linear-gradient(135deg, #004d40 0%, #00695c 50%, #003d33 100%);
    --header-bg: linear-gradient(135deg, rgba(0, 105, 92, 0.85) 0%, rgba(0, 77, 64, 0.85) 100%);
    --card-bg: linear-gradient(135deg, rgba(0, 105, 92, 0.75) 0%, rgba(0, 77, 64, 0.75) 100%);
    --card-border: rgba(77, 182, 172, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #80deea;
    --tab-bg: linear-gradient(135deg, rgba(0, 105, 92, 0.8) 0%, rgba(0, 77, 64, 0.8) 100%);
    --tab-border: rgba(77, 182, 172, 0.5);
    --tab-active: linear-gradient(135deg, #4db6ac 0%, #26a69a 50%, #00897b 100%);
    --meeting-bg: linear-gradient(135deg, rgba(0, 77, 64, 0.7) 0%, rgba(0, 61, 51, 0.7) 100%);
    --meeting-border: rgba(77, 182, 172, 0.4);
    --chat-bg: linear-gradient(135deg, rgba(0, 61, 51, 0.6) 0%, rgba(0, 42, 34, 0.6) 100%);
    --input-bg: rgba(0, 77, 64, 0.6);
    --btn-primary: linear-gradient(135deg, #26a69a 0%, #00897b 50%, #00695c 100%);
    --btn-danger: linear-gradient(135deg, #ef5350 0%, #e53935 50%, #c62828 100%);
    --btn-success: linear-gradient(135deg, #66bb6a 0%, #43a047 50%, #2e7d32 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(77, 182, 172, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(77, 182, 172, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glow: 0 0 20px rgba(77, 182, 172, 0.3);
}

/* Professional Dark Green Theme */
[data-theme="forest"] {
    --bg-primary: linear-gradient(135deg, #1b5e20 0%, #2e7d32 50%, #0d3e11 100%);
    --header-bg: linear-gradient(135deg, rgba(46, 125, 50, 0.85) 0%, rgba(27, 94, 32, 0.85) 100%);
    --card-bg: linear-gradient(135deg, rgba(46, 125, 50, 0.75) 0%, rgba(27, 94, 32, 0.75) 100%);
    --card-border: rgba(129, 199, 132, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #a5d6a7;
    --tab-bg: linear-gradient(135deg, rgba(46, 125, 50, 0.8) 0%, rgba(27, 94, 32, 0.8) 100%);
    --tab-border: rgba(129, 199, 132, 0.5);
    --tab-active: linear-gradient(135deg, #81c784 0%, #66bb6a 50%, #43a047 100%);
    --meeting-bg: linear-gradient(135deg, rgba(27, 94, 32, 0.7) 0%, rgba(13, 62, 17, 0.7) 100%);
    --meeting-border: rgba(129, 199, 132, 0.4);
    --chat-bg: linear-gradient(135deg, rgba(13, 62, 17, 0.6) 0%, rgba(8, 42, 11, 0.6) 100%);
    --input-bg: rgba(27, 94, 32, 0.6);
    --btn-primary: linear-gradient(135deg, #66bb6a 0%, #43a047 50%, #2e7d32 100%);
    --btn-danger: linear-gradient(135deg, #ef5350 0%, #e53935 50%, #c62828 100%);
    --btn-success: linear-gradient(135deg, #81c784 0%, #66bb6a 50%, #43a047 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(129, 199, 132, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(129, 199, 132, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glow: 0 0 20px rgba(129, 199, 132, 0.3);
}

/* Professional Dark Orange Theme */
[data-theme="black"] {
    --bg-primary: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #050505 100%);
    --header-bg: linear-gradient(135deg, rgba(26, 26, 26, 0.92) 0%, rgba(12, 12, 12, 0.92) 100%);
    --card-bg: linear-gradient(135deg, rgba(28, 28, 28, 0.85) 0%, rgba(12, 12, 12, 0.85) 100%);
    --card-border: rgba(120, 120, 120, 0.25);
    --text-primary: #f5f5f5;
    --text-secondary: #b5b5b5;
    --tab-bg: linear-gradient(135deg, rgba(32, 32, 32, 0.9) 0%, rgba(18, 18, 18, 0.9) 100%);
    --tab-border: rgba(120, 120, 120, 0.35);
    --tab-active: linear-gradient(135deg, #4f46e5 0%, #312e81 50%, #1e1b4b 100%);
    --meeting-bg: linear-gradient(135deg, rgba(18, 18, 18, 0.85) 0%, rgba(8, 8, 8, 0.85) 100%);
    --meeting-border: rgba(120, 120, 120, 0.35);
    --chat-bg: linear-gradient(135deg, rgba(14, 14, 14, 0.75) 0%, rgba(5, 5, 5, 0.75) 100%);
    --input-bg: rgba(24, 24, 24, 0.85);
    --btn-primary: linear-gradient(135deg, #4b5563 0%, #374151 50%, #1f2937 100%);
    --btn-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 50%, #b91c1c 100%);
    --btn-success: linear-gradient(135deg, #22c55e 0%, #16a34a 50%, #15803d 100%);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.65), 0 2px 12px rgba(79, 70, 229, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    --shadow-lg: 0 12px 60px rgba(0, 0, 0, 0.7), 0 6px 24px rgba(79, 70, 229, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    --glow: 0 0 30px rgba(79, 70, 229, 0.35);
}

[data-theme="dull-white"] {
    --bg-primary: linear-gradient(135deg, #f2f3f5 0%, #e6e9ef 50%, #dadddf 100%);
    --header-bg: linear-gradient(135deg, rgba(230, 233, 239, 0.9) 0%, rgba(214, 218, 224, 0.9) 100%);
    --card-bg: linear-gradient(135deg, rgba(244, 245, 247, 0.85) 0%, rgba(229, 232, 236, 0.85) 100%);
    --card-border: rgba(148, 163, 184, 0.45);
    --text-primary: #1f2933;
    --text-secondary: #475569;
    --tab-bg: linear-gradient(135deg, rgba(229, 232, 236, 0.95) 0%, rgba(213, 216, 222, 0.95) 100%);
    --tab-border: rgba(148, 163, 184, 0.55);
    --tab-active: linear-gradient(135deg, #94a3b8 0%, #818da3 50%, #64748b 100%);
    --meeting-bg: linear-gradient(135deg, rgba(229, 231, 235, 0.85) 0%, rgba(209, 213, 219, 0.85) 100%);
    --meeting-border: rgba(148, 163, 184, 0.55);
    --chat-bg: linear-gradient(135deg, rgba(226, 232, 240, 0.8) 0%, rgba(203, 213, 225, 0.8) 100%);
    --input-bg: rgba(236, 239, 244, 0.9);
    --btn-primary: linear-gradient(135deg, #818da3 0%, #64748b 50%, #4b5563 100%);
    --btn-danger: linear-gradient(135deg, #ef5350 0%, #e53935 50%, #c62828 100%);
    --btn-success: linear-gradient(135deg, #34d399 0%, #10b981 50%, #059669 100%);
    --shadow: 0 4px 20px rgba(15, 23, 42, 0.18), 0 2px 10px rgba(148, 163, 184, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.35);
    --shadow-lg: 0 12px 60px rgba(15, 23, 42, 0.22), 0 6px 28px rgba(148, 163, 184, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.35);
    --glow: 0 0 32px rgba(148, 163, 184, 0.35);
}

/* Professional Dark Indigo Theme */
[data-theme="purple"] {
    --bg-primary: linear-gradient(135deg, #1a237e 0%, #283593 50%, #0d47a1 100%);
    --header-bg: linear-gradient(135deg, rgba(40, 53, 147, 0.85) 0%, rgba(26, 35, 126, 0.85) 100%);
    --card-bg: linear-gradient(135deg, rgba(40, 53, 147, 0.75) 0%, rgba(26, 35, 126, 0.75) 100%);
    --card-border: rgba(159, 168, 218, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #c5cae9;
    --tab-bg: linear-gradient(135deg, rgba(40, 53, 147, 0.8) 0%, rgba(26, 35, 126, 0.8) 100%);
    --tab-border: rgba(159, 168, 218, 0.5);
    --tab-active: linear-gradient(135deg, #9fa8da 0%, #7986cb 50%, #5c6bc0 100%);
    --meeting-bg: linear-gradient(135deg, rgba(26, 35, 126, 0.7) 0%, rgba(13, 71, 161, 0.7) 100%);
    --meeting-border: rgba(159, 168, 218, 0.4);
    --chat-bg: linear-gradient(135deg, rgba(13, 71, 161, 0.6) 0%, rgba(10, 53, 112, 0.6) 100%);
    --input-bg: rgba(26, 35, 126, 0.6);
    --btn-primary: linear-gradient(135deg, #7986cb 0%, #5c6bc0 50%, #3f51b5 100%);
    --btn-danger: linear-gradient(135deg, #ef5350 0%, #e53935 50%, #c62828 100%);
    --btn-success: linear-gradient(135deg, #66bb6a 0%, #43a047 50%, #2e7d32 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(159, 168, 218, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(159, 168, 218, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glow: 0 0 20px rgba(159, 168, 218, 0.3);
}

/* Theme Switcher Styles */
.theme-switcher {
    position: relative;
    display: inline-flex;
    align-items: center;
    z-index: 1000;
    pointer-events: auto;
}

.theme-switcher-btn {
    background: var(--btn-primary, linear-gradient(135deg, #42a5f5 0%, #1e88e5 50%, #1565c0 100%)) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    cursor: pointer;
    padding: 0.5rem !important;
    border-radius: 8px !important;
    color: #ffffff !important;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(100, 181, 246, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
    position: relative;
    z-index: 1001;
}

.theme-switcher-btn:hover {
    background: var(--btn-primary, linear-gradient(135deg, #42a5f5 0%, #1e88e5 50%, #1565c0 100%)) !important;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(100, 181, 246, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.3) !important;
    filter: brightness(1.15);
    border-color: rgba(255, 255, 255, 0.4) !important;
}

.theme-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: auto;
    background: var(--card-bg, linear-gradient(135deg, rgba(45, 74, 107, 0.95) 0%, rgba(30, 58, 95, 0.95) 100%)) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 2px solid var(--card-border, rgba(100, 181, 246, 0.4));
    border-radius: 12px;
    padding: 0.5rem;
    min-width: 200px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(100, 181, 246, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    z-index: 1002 !important;
    pointer-events: none;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
}

/* Adjust theme menu position if it would go off-screen */
.theme-switcher {
    position: relative;
}

@media (max-width: 768px) {
    .theme-menu {
        right: 0;
        left: auto;
    }
}

.theme-menu.active {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    transform: translateY(0) !important;
    pointer-events: auto !important;
    max-height: none !important;
    overflow: visible !important;
}

.theme-option {
    padding: 0.75rem 1rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-primary, #ffffff);
    cursor: pointer;
    border-radius: 8px;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.theme-option:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--tab-border, rgba(100, 181, 246, 0.5));
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-option.active {
    background: var(--btn-primary, linear-gradient(135deg, #42a5f5 0%, #1e88e5 50%, #1565c0 100%));
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(100, 181, 246, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 0 20px rgba(100, 181, 246, 0.3);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.theme-option::before {
    content: '●';
    font-size: 1rem;
    opacity: 0;
}

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

/* Apply theme variables to existing styles - Professional Dark with Gradients & Glassmorphism */
body[data-theme] {
    background: var(--bg-primary) !important;
    background-attachment: fixed;
    color: var(--text-primary);
}

body[data-theme] .dashboard-header,
body[data-theme] .header {
    background: var(--header-bg) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 2px solid var(--card-border) !important;
    box-shadow: var(--shadow-lg) !important;
    border-radius: 0 !important;
    position: relative;
}

body[data-theme] .dashboard-header::before,
body[data-theme] .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

body[data-theme] .card {
    background: var(--card-bg) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 2px solid var(--card-border) !important;
    border-radius: 12px !important;
    color: var(--text-primary);
    box-shadow: var(--shadow-lg) !important;
    position: relative;
    overflow: hidden;
}

body[data-theme] .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    z-index: 1;
}

body[data-theme] .tabs-nav {
    background: var(--tab-bg) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 2px solid var(--tab-border) !important;
    border-radius: 12px 12px 0 0 !important;
    box-shadow: var(--shadow) !important;
    padding: 4px;
    position: relative;
}

body[data-theme] .tabs-nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

body[data-theme] .tab-btn {
    color: var(--text-secondary);
    border-radius: 8px;
    margin: 2px;
    border: 1px solid transparent;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

body[data-theme] .tab-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--tab-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

body[data-theme] .tab-btn.active {
    background: var(--tab-active) !important;
    color: white !important;
    border: 2px solid var(--tab-border) !important;
    box-shadow: var(--shadow), var(--glow) !important;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    position: relative;
}

body[data-theme] .tab-btn.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

body[data-theme] .tabs-content {
    background: var(--meeting-bg) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 2px solid var(--meeting-border) !important;
    border-radius: 0 0 12px 12px !important;
    box-shadow: var(--shadow) !important;
    position: relative;
}

body[data-theme] .create-student-form {
    background: var(--tab-bg) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 2px solid var(--tab-border) !important;
    border-radius: 12px !important;
    box-shadow: var(--shadow-lg) !important;
    position: relative;
    overflow: hidden;
}

body[data-theme] .create-student-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--tab-active);
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.3);
}

body[data-theme] .chat-messages {
    background: var(--chat-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

body[data-theme] .form-input {
    background: var(--input-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary) !important;
    border: 2px solid var(--card-border) !important;
    border-radius: 8px !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.1);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

body[data-theme] .form-input:focus {
    border-color: var(--tab-border) !important;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15), inset 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 255, 255, 0.1), var(--glow) !important;
    outline: none;
    background: rgba(255, 255, 255, 0.1) !important;
}

body[data-theme] .btn-primary {
    background: var(--btn-primary) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    border-radius: 8px !important;
    color: white !important;
    box-shadow: var(--shadow-lg), var(--glow) !important;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}

body[data-theme] .btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

body[data-theme] .btn-primary:hover::before {
    left: 100%;
}

body[data-theme] .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow), 0 0 30px rgba(255, 255, 255, 0.2) !important;
    filter: brightness(1.15);
    border-color: rgba(255, 255, 255, 0.4) !important;
}

body[data-theme] .btn-danger {
    background: var(--btn-danger) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    border-radius: 8px !important;
    color: white !important;
    box-shadow: var(--shadow-lg), 0 0 20px rgba(239, 83, 80, 0.4) !important;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}

body[data-theme] .btn-danger::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

body[data-theme] .btn-danger:hover::before {
    left: 100%;
}

body[data-theme] .btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(239, 83, 80, 0.5), 0 0 20px rgba(255, 255, 255, 0.2) !important;
    filter: brightness(1.15);
    border-color: rgba(255, 255, 255, 0.4) !important;
}

body[data-theme] .btn-success {
    background: var(--btn-success) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    border-radius: 8px !important;
    color: white !important;
    box-shadow: var(--shadow-lg), 0 0 20px rgba(102, 187, 106, 0.4) !important;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}

body[data-theme] .btn-success::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

body[data-theme] .btn-success:hover::before {
    left: 100%;
}

body[data-theme] .btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(102, 187, 106, 0.5), 0 0 20px rgba(255, 255, 255, 0.2) !important;
    filter: brightness(1.15);
    border-color: rgba(255, 255, 255, 0.4) !important;
}

body[data-theme] .meeting-status {
    background: var(--card-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary) !important;
    border: 2px solid var(--card-border) !important;
    border-radius: 8px !important;
    box-shadow: var(--shadow) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .meeting-status.active {
    background: linear-gradient(135deg, rgba(102, 187, 106, 0.4) 0%, rgba(67, 160, 71, 0.4) 100%) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #ffffff !important;
    border-color: #66bb6a !important;
    box-shadow: 0 0 20px rgba(102, 187, 106, 0.5), var(--shadow) !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

body[data-theme] .student-count {
    background: var(--card-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-secondary) !important;
    border: 2px solid var(--card-border) !important;
    border-radius: 8px !important;
    box-shadow: var(--shadow) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .logo {
    color: var(--text-primary) !important;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.5), 0 0 10px rgba(255, 255, 255, 0.2);
    font-weight: 700;
}

body[data-theme] .text-secondary {
    color: var(--text-secondary) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .chat-input-container {
    background: var(--card-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 2px solid var(--card-border) !important;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
}

body[data-theme] h1, body[data-theme] h2, body[data-theme] h3, body[data-theme] h4, body[data-theme] h5, body[data-theme] h6 {
    color: var(--text-primary) !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

body[data-theme] p, body[data-theme] span, body[data-theme] div {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] strong {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    font-weight: 600;
}

/* Additional Premium Glossy Effects */
body[data-theme] .card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 30%, rgba(255, 255, 255, 0.05) 100%);
    pointer-events: none;
    border-radius: 12px;
    z-index: 0;
}

body[data-theme] .card > * {
    position: relative;
    z-index: 1;
}

body[data-theme] .btn-outline {
    background: transparent !important;
    border: 2px solid var(--tab-border) !important;
    color: var(--text-primary) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    box-shadow: var(--shadow), var(--glow) !important;
}

body[data-theme] .list-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

body[data-theme] .list-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--tab-border);
    box-shadow: var(--shadow);
}

body[data-theme] .participant-card {
    background: var(--card-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid var(--card-border) !important;
    box-shadow: var(--shadow) !important;
}

body[data-theme] .participant-card.speaking {
    border-color: var(--btn-success) !important;
    box-shadow: 0 0 20px rgba(102, 187, 106, 0.5), var(--shadow) !important;
    background: linear-gradient(135deg, rgba(102, 187, 106, 0.2) 0%, rgba(67, 160, 71, 0.2) 100%) !important;
}

body[data-theme] .audio-container {
    background: var(--card-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid var(--card-border) !important;
    box-shadow: var(--shadow) !important;
}

body[data-theme] .audio-container.speaking {
    border-color: var(--btn-success) !important;
    box-shadow: 0 0 25px rgba(102, 187, 106, 0.6), var(--shadow) !important;
    background: linear-gradient(135deg, rgba(102, 187, 106, 0.25) 0%, rgba(67, 160, 71, 0.25) 100%) !important;
}

body[data-theme] .message {
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .message.sent {
    background: var(--btn-primary) !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
}

body[data-theme] .message.received {
    background: var(--card-bg) !important;
    border: 2px solid var(--card-border) !important;
    box-shadow: var(--shadow);
}

/* Ensure all text is visible with proper contrast */
body[data-theme] label {
    color: var(--text-primary) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

body[data-theme] .form-label {
    color: var(--text-primary) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .card-header {
    border-bottom-color: var(--card-border) !important;
}

body[data-theme] .card-title {
    color: var(--text-primary) !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* Login Page Theme Support - Professional Dark with Gradients */
body[data-theme] .login-form {
    background: var(--card-bg) !important;
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border: 2px solid var(--card-border) !important;
    border-radius: 16px !important;
    box-shadow: var(--shadow-lg) !important;
    position: relative;
    overflow: hidden;
}

body[data-theme] .login-form::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%, rgba(255, 255, 255, 0.05) 100%);
    pointer-events: none;
    z-index: 0;
}

body[data-theme] .login-form > * {
    position: relative;
    z-index: 1;
}

body[data-theme] .login-form::before {
    background: var(--tab-active) !important;
    height: 4px !important;
    box-shadow: 0 2px 12px rgba(255, 255, 255, 0.4), var(--glow);
    z-index: 2;
}

body[data-theme] .form-title {
    color: var(--text-primary) !important;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.5), 0 0 10px rgba(255, 255, 255, 0.2);
    font-weight: 700;
}

body[data-theme] .form-title i {
    background: var(--tab-active) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
    filter: drop-shadow(0 2px 6px rgba(255, 255, 255, 0.4));
}

body[data-theme] .form-group .form-label {
    color: var(--text-primary) !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    font-weight: 600;
}

body[data-theme] .form-group .form-label i {
    background: var(--tab-active) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
    filter: drop-shadow(0 1px 3px rgba(255, 255, 255, 0.3));
}

body[data-theme] .form-group .form-input {
    background: var(--input-bg) !important;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    color: var(--text-primary) !important;
    border: 2px solid var(--card-border) !important;
    border-radius: 10px !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(255, 255, 255, 0.1), var(--shadow) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .form-group .form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body[data-theme] .form-group .form-input:focus {
    border-color: var(--tab-border) !important;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15), inset 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 25px rgba(255, 255, 255, 0.15), var(--glow) !important;
    outline: none;
    background: rgba(255, 255, 255, 0.12) !important;
}

body[data-theme] .login-button {
    background: var(--btn-primary) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    border-radius: 10px !important;
    box-shadow: var(--shadow-lg), var(--glow) !important;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

body[data-theme] .login-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

body[data-theme] .login-button:hover::before {
    left: 100%;
}

body[data-theme] .login-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow), 0 0 30px rgba(255, 255, 255, 0.25) !important;
    filter: brightness(1.15);
    border-color: rgba(255, 255, 255, 0.4) !important;
}

body[data-theme] .password-toggle:hover {
    color: var(--text-primary) !important;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.6);
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.4));
}

body[data-theme] .login-subtitle {
    color: var(--text-secondary) !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    font-weight: 500;
}

body[data-theme] .login-header .logo {
    background: var(--tab-active) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
    filter: drop-shadow(0 2px 6px rgba(255, 255, 255, 0.4));
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* Responsive theme switcher */
@media (max-width: 768px) {
    .theme-switcher-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .theme-menu {
        min-width: 150px;
        top: calc(100% + 8px);
        right: 0;
        left: auto;
    }
    
    .theme-option {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
}