/* ==========================================
   Viriyah Service Dashboard - Design System
   Minimal White Theme (Light Mode)
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Prompt:wght@300;400;500;600;700&display=swap');

/* ---- CSS Variables (Light Theme) ---- */
:root {
    --bg-primary: #f8fafc;
    /* Slate 50 */
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    /* Slate 100 */
    --bg-glass: rgba(255, 255, 255, 0.8);
    --border-glass: #e2e8f0;
    /* Slate 200 */
    --border-glass-hover: #cbd5e1;
    /* Slate 300 */

    --text-primary: #1e293b;
    /* Slate 800 */
    --text-secondary: #64748b;
    /* Slate 500 */
    --text-muted: #94a3b8;
    /* Slate 400 */

    --accent-blue: #2563eb;
    /* Blue 600 */
    --accent-blue-glow: rgba(37, 99, 235, 0.1);
    --accent-green: #059669;
    /* Emerald 600 */
    --accent-green-glow: rgba(5, 150, 105, 0.1);
    --accent-red: #dc2626;
    /* Red 600 */
    --accent-red-glow: rgba(220, 38, 38, 0.1);
    --accent-yellow: #d97706;
    /* Amber 600 */
    --accent-yellow-glow: rgba(217, 119, 6, 0.1);
    --accent-purple: #9333ea;
    /* Purple 600 */
    --accent-purple-glow: rgba(147, 51, 234, 0.1);
    --accent-cyan: #0891b2;
    /* Cyan 600 */

    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
    --gradient-success: linear-gradient(135deg, #059669 0%, #0d9488 100%);
    --gradient-danger: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(241, 245, 249, 0.5) 100%);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-glow-blue: 0 0 0 3px rgba(37, 99, 235, 0.1);
    --shadow-glow-green: 0 0 0 3px rgba(5, 150, 105, 0.1);

    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Prompt', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ---- Container ---- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* ---- Header / Nav Bar ---- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.page-header .subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.back-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-glass-hover);
}

/* ---- Cards ---- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* ---- KPI Cards ---- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-glass-hover);
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.kpi-card:nth-child(2)::before {
    background: var(--gradient-success);
}

.kpi-card:nth-child(3)::before {
    background: var(--gradient-danger);
}

.kpi-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.kpi-sub {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ---- Chart Cards ---- */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chart-card h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-primary);
}

/* ---- Tabs ---- */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-glass);
    padding-bottom: 0;
    background: transparent;
    border-radius: 0;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    border-radius: 0;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: -2px;
    transition: all var(--transition-normal);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
    background: transparent;
    box-shadow: none;
}

/* ---- Filters ---- */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    background: var(--bg-card);
    padding: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-sm);
    align-items: center;
}

.filter-bar input,
.filter-bar select {
    padding: 0.6rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-fast);
}

.filter-bar input:focus,
.filter-bar select:focus {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow-blue);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.6rem 1.25rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-success {
    background: var(--accent-green);
    color: white;
}

.btn-success:hover {
    background: #047857;
}

.btn-danger {
    background: var(--accent-red);
    color: white;
}

.btn-danger:hover {
    background: #b91c1c;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

/* ---- Tables ---- */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glass);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    background: var(--bg-card);
}

thead {
    background: var(--bg-primary);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-glass);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-primary);
}

tr:hover {
    background: var(--bg-primary);
}

/* ---- Helper Classes ---- */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mt-4 {
    margin-top: 1rem;
}