:root {
    /* Primary Brand Color */
    --primary-color: #ff7555;
    --primary-hover: #ff5e3a;
    --primary-light: rgba(255, 117, 85, 0.1);
    
    /* Semantic Colors */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Light Theme Palette - Subtle & Clean */
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --input-focus: #ff7555;
    
    /* Shadows & Elevation */
    --shadow-sm: 0 1px 2px 0 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);
}

[data-theme="dark"] {
    /* Dark Theme Palette - Deep & Professional */
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-sidebar: #1e293b;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --input-focus: #ff7555;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Base Body Styles */
body {
    background-color: var(--bg-main) !important;
    color: var(--text-main) !important;
    font-family: 'Inter', 'Segoe UI', Roboto, sans-serif !important;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

/* Modern Card Component */
.modern-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.modern-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 117, 85, 0.3);
}

/* Glassmorphism Utilities */
.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .glass-panel {
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-main);
    font-weight: 700;
    letter-spacing: -0.025em;
}

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

/* Action Buttons */
.btn-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-primary-modern {
    background-color: var(--primary-color);
    color: white !important;
}

.btn-primary-modern:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 117, 85, 0.3);
}

/* Interactive Elements */
.interactive-list-item {
    padding: 12px;
    border-radius: 8px;
    transition: background 0.2s ease;
    cursor: pointer;
}

.interactive-list-item:hover {
    background: var(--primary-light);
}

/* Theme Switcher Toggle */
.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.2s ease;
    cursor: pointer;
}

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