/* Base Styles & Design Tokens */
:root,
html[data-theme="dark"] {
    color-scheme: dark;
    --color-navy: #1a2b4c;
    --color-navy-dark: #0b1329;
    --color-gold: #c5a059;
    --color-gold-hover: #d4af37;
    --color-cream: #f9f8f4;
    --color-gray: #94a3b8;
    --color-gray-light: #1e293b;
    --color-gray-border: rgba(197, 160, 89, 0.25);
    --color-white: #ffffff;

    /* Theme Tokens - Dark Default */
    --bg-body: #0b1329;
    --bg-card: #13223f;
    --bg-card-hover: #192c50;
    --bg-header: #070d1d;
    --bg-input: rgba(255, 255, 255, 0.05);
    --bg-stat-icon: rgba(197, 160, 89, 0.15);
    --bg-table-th: #0f1c34;
    --bg-table-hover: rgba(255, 255, 255, 0.03);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-navy-brand: #ffffff;
    --text-link: #c5a059;
    --logo-color: #c5a059;
    --logo-color-nav: #c5a059;
    --border-color: rgba(197, 160, 89, 0.25);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --transition-smooth: all 0.3s ease;
}

html[data-theme="light"] {
    color-scheme: light;
    /* Theme Tokens - Light Override */
    --bg-body: #f9f8f4;
    --bg-card: #ffffff;
    --bg-card-hover: #ffffff;
    --bg-header: #1a2b4c;
    --bg-input: #ffffff;
    --bg-stat-icon: #f9f8f4;
    --bg-table-th: #f9f8f4;
    --bg-table-hover: #fafafa;

    --color-gray: #6b7280;
    --color-gray-light: #f3f4f6;
    --color-gray-border: #d1d5db;
    
    --text-primary: #1a2b4c;
    --text-secondary: #6b7280;
    --text-navy-brand: #1a2b4c;
    --text-link: #1a2b4c;
    --logo-color: #1a2b4c;
    --logo-color-nav: #c5a059;
    --border-color: #d1d5db;
    --border-subtle: #f0f0f0;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    width: 100%;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    position: relative;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem;
    background: rgba(197, 160, 89, 0.12);
    border: 1px solid var(--color-gold);
    border-radius: 20px;
    color: var(--color-gold);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    user-select: none;
}

.theme-toggle-btn:hover {
    background: var(--color-gold);
    color: #0b1329;
}

.theme-toggle-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.login-theme-toggle-container {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 10;
}

/* Common Animations & Utilities */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
    display: inline-block;
}

/* Alert Utility Classes */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    border-left: 4px solid var(--color-gold);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    line-height: 1.4;
    background: var(--bg-card);
    color: var(--text-primary);
}

.alert-error,
.alert-danger {
    background-color: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border-left-color: #ef4444;
}

html[data-theme="light"] .alert-error,
html[data-theme="light"] .alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left-color: #ef4444;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.12);
    color: #10b981;
    border-left-color: #10b981;
}

html[data-theme="light"] .alert-success {
    background-color: #ecfdf5;
    color: #065f46;
    border-left-color: #10b981;
}