:root {
    --transition-speed: 0.3s;
    --primary: #FF4500;
    --secondary: #FF6347;
    --success: #10B981;
    --danger: #EF4444;
    --warning: #F59E0B;
}

[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #e5e7eb;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --card-bg: #1f2937;
    --sidebar-bg: #111827;
    --hover-bg: #374151;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --border-color: #d1d5db;
    --card-bg: #ffffff;
    --sidebar-bg: #f9fafb;
    --hover-bg: #f3f4f6;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.sidebar, .sidebar-gradient {
    background: var(--sidebar-bg) !important;
    transition: background var(--transition-speed);
}

.bg-gray-800, .bg-gray-700 {
    background-color: var(--card-bg) !important;
    transition: background-color var(--transition-speed);
}

.text-white, .text-gray-100 { color: var(--text-primary) !important; }
.text-gray-400 { color: var(--text-tertiary) !important; }
.text-gray-300 { color: var(--text-secondary) !important; }

.border-gray-700, .border-gray-600 {
    border-color: var(--border-color) !important;
}

input, select, textarea {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
    transition: all var(--transition-speed);
}

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

.nav-link {
    color: var(--text-secondary);
    transition: all var(--transition-speed);
}

.nav-link:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

table { color: var(--text-primary); }
table thead, table tbody tr { border-color: var(--border-color) !important; }
table tbody tr:hover { background-color: var(--hover-bg); }

.modal-content {
    background-color: var(--card-bg) !important;
    border: 1px solid var(--border-color);
}

header {
    background-color: var(--card-bg) !important;
    border-bottom: 1px solid var(--border-color) !important;
}

.theme-toggle-btn {
    cursor: pointer;
    border: none;
    outline: none;
    transition: transform var(--transition-speed);
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
}

.theme-toggle-btn:focus {
    box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.3);
}

[data-theme="light"] .sidebar, [data-theme="light"] .sidebar-gradient {
    background: linear-gradient(180deg, #f9fafb 0%, #f3f4f6 100%) !important;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .bg-gray-800, [data-theme="light"] .card-bg {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] input, [data-theme="light"] select, [data-theme="light"] textarea {
    background-color: #ffffff !important;
    border: 1px solid #d1d5db !important;
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--hover-bg); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media print {
    .theme-toggle-btn, .sidebar, header button { display: none !important; }
    body { background: white !important; color: black !important; }
}