:root {
    --primary: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

/* Light mode */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #000000;
    --text-secondary: #1a1a1a;
    --text-muted: #333333;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* Dark mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #ffffff;
    --text-secondary: #f0f0f0;
    --text-muted: #cccccc;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary) !important;
    line-height: 1.6;
    transition: all 0.3s ease;
}

.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 50%, #ec4899 100%);
    backdrop-filter: blur(10px);
    border: none;
    box-shadow: 0 4px 20px var(--shadow);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    padding: 8px 16px;
    color: white !important;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.dashboard-card {
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 8px 30px var(--shadow);
    border: 1px solid var(--border);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.dashboard-card:hover {
    box-shadow: 0 12px 40px var(--shadow);
}

.section-title {
    color: var(--text-primary) !important;
    font-weight: 700 !important;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.form-control, .form-select {
    background: var(--bg-secondary) !important;
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary) !important;
    font-weight: 500;
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    background: var(--bg-primary) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1) !important;
    color: var(--text-primary) !important;
}

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

.form-label {
    color: var(--text-primary) !important;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.btn {
    border-radius: 12px;
    font-weight: 600;
    padding: 12px 24px;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white !important;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.form-check-input {
    width: 1.2em;
    height: 1.2em;
    border-radius: 6px;
}

.form-check-label {
    color: var(--text-primary) !important;
    font-weight: 600 !important;
    margin-left: 8px;
}

.table {
    background: var(--bg-primary) !important;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px var(--shadow);
    border: 1px solid var(--border);
}

.table th {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
    font-weight: 700 !important;
    border: none;
    padding: 1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    color: var(--text-primary) !important;
    background: var(--bg-primary) !important;
    border-color: var(--border);
    padding: 1rem;
    font-weight: 600 !important;
    font-size: 0.95rem;
}

.table tbody tr:hover {
    background: var(--bg-secondary) !important;
}

.table tbody tr:hover td {
    background: var(--bg-secondary) !important;
}

.charts-container {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 4px 20px var(--shadow);
    border: 1px solid var(--border);
}

#loadingOverlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.loading-text {
    color: white !important;
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 1rem;
}

#errorMessage {
    display: none;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger) !important;
    border-radius: 12px;
    padding: 1rem;
    margin: 1rem 0;
    font-weight: 500;
}

.badge {
    font-weight: 700 !important;
    font-size: 0.85rem !important;
    padding: 6px 12px !important;
}

.bg-danger {
    background-color: var(--danger) !important;
    color: white !important;
}

.bg-success {
    background-color: var(--success) !important;
    color: white !important;
}

.bg-warning {
    background-color: var(--warning) !important;
    color: white !important;
}

.app-badge {
    background: linear-gradient(135deg, var(--primary), #8b5cf6) !important;
    color: white !important;
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 8px;
    display: inline-block;
}

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

h1, h2, h3, h4, h5, h6, p, span, div, label, small {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .table td {
    color: #ffffff !important;
}

[data-theme="dark"] .table th {
    color: #ffffff !important;
}

@media (max-width: 768px) {
    .dashboard-card {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
}