/* ============================================================
   AIBALANCE Dashboard - Styles
   ============================================================ */

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #353639;
    --text-secondary: #6b7280;
    --text-muted: #9ca3b1;
    --border-color: #e6e8ed;
    --border-card: #ebedf0;
    --accent: #4373BB;
    --accent-hover: #5a8fd0;
    --accent-light: #e8f0fa;
    --success: #22c55e;
    --success-bg: #f0fdf4;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --error: #ef4444;
    --error-bg: #fef2f2;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.08);
    --radius: 10px;
    --radius-sm: 6px;
    --transition: 0.2s ease;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
    --hero-text: #EEF3F9;
}

[data-theme="dark"] {
    --bg-primary: #111111;
    --bg-secondary: #171717;
    --bg-card: #1e1e1e;
    --text-primary: #C8D0DD;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-color: #2d2d2d;
    --border-card: #2a2a2a;
    --accent: #66A2EB;
    --accent-hover: #7fb3f0;
    --accent-light: #1e293b;
    --success: #4ade80;
    --success-bg: #14261a;
    --warning: #fbbf24;
    --warning-bg: #27200e;
    --error: #f87171;
    --error-bg: #2a1515;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.4);
    --hero-text: #EEF3F9;
}

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

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

/* ============ Hero Banner ============ */
.hero {
    position: relative;
    overflow: hidden;
    min-height: 340px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 24px 60px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Dark mode: darken the hero image overlay */
[data-theme="dark"] .hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.45);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--hero-text);
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-shadow: 0 2px 16px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 16px;
    color: rgba(238, 243, 249, 0.8);
    font-weight: 400;
    margin-bottom: 24px;
    text-shadow: 0 1px 8px rgba(0,0,0,0.15);
}

.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 20px;
    padding: 6px 18px;
    font-size: 13px;
    color: var(--hero-text);
}

.hero-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 6px rgba(74,222,128,0.6);
}

/* ============ Top bar (inside hero) ============ */
.top-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo {
    font-size: 16px;
    font-weight: 700;
    color: var(--hero-text);
    letter-spacing: 0.5px;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-sm);
    padding: 5px 10px;
    cursor: pointer;
    color: var(--hero-text);
    font-size: 13px;
    transition: all var(--transition);
}

.theme-toggle:hover {
    background: rgba(255,255,255,0.25);
}

.refresh-indicator {
    font-size: 12px;
    color: rgba(238,243,249,0.7);
    display: flex;
    align-items: center;
    gap: 4px;
}

.refresh-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #4ade80;
    display: inline-block;
}

.refresh-dot.loading {
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ============ Main Content ============ */
.main-content {
    max-width: 1200px;
    margin: -40px auto 0;
    padding: 0 24px 80px;
    position: relative;
    z-index: 2;
}

/* ============ KPI Cards ============ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 28px;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: box-shadow var(--transition);
    box-shadow: var(--shadow-card);
}

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

.kpi-card.hidden {
    display: none;
}

.kpi-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.kpi-icon {
    font-size: 13px;
}

.kpi-value {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    font-feature-settings: 'tnum';
    font-variant-numeric: tabular-nums;
    transition: color var(--transition);
}

.kpi-sub {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 3px;
}

.health-bar {
    height: 3px;
    background: var(--border-color);
    border-radius: 2px;
    margin-top: 10px;
    overflow: hidden;
}

.health-bar-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.6s ease;
}

.health-bar-fill.good { background: var(--success); }
.health-bar-fill.warn { background: var(--warning); }
.health-bar-fill.bad  { background: var(--error); }

/* ============ Section ============ */
.section {
    margin-bottom: 28px;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ============ Model List ============ */
.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 14px;
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

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

.model-card-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.model-status {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
}

.model-status.healthy    { background: var(--success); }
.model-status.unhealthy  { background: var(--error); }
.model-status.unknown    { background: var(--text-muted); }

.model-info {
    flex: 1;
    min-width: 0;
}

.model-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.model-meta {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 1px 7px;
    border-radius: 10px;
    font-size: 10px;
    font-weight: 600;
    line-height: 17px;
}

.badge-memfit {
    background: var(--accent-light);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.badge-free {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
}

.model-stats {
    text-align: right;
    flex-shrink: 0;
}

.model-stat-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.model-stat-label {
    font-size: 10px;
    color: var(--text-muted);
}

/* ============ Latency chart (SVG inside model card) ============ */
.latency-chart-wrap {
    margin-top: 8px;
    position: relative;
    height: 40px;
    overflow: hidden;
}

.latency-chart-wrap svg {
    display: block;
    width: 100%;
    height: 40px;
}

.latency-label {
    position: absolute;
    right: 0;
    top: 0;
    font-size: 10px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

/* ============ Uptime Section ============ */
.uptime-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.uptime-row {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.uptime-name {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-primary);
    width: 150px;
    flex-shrink: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.uptime-bar-wrap {
    flex: 1;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
}

.uptime-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.6s ease;
}

.uptime-percent {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    width: 50px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ============ Portal Link ============ */
.portal-link-wrap {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 200;
}

.portal-link {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    box-shadow: var(--shadow-card);
    transition: all var(--transition);
}

.portal-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

/* ============ Footer ============ */
.footer {
    text-align: center;
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 11px;
}

/* ============ Empty State ============ */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 13px;
}

/* ============ Loading skeleton ============ */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--border-color) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-model {
    height: 90px;
    border-radius: var(--radius);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .main-content {
        padding: 0 20px 80px;
    }
    .hero {
        min-height: 280px;
        padding: 70px 20px 50px;
    }
    .hero-title { font-size: 32px; }
}

@media (max-width: 640px) {
    .kpi-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .model-grid {
        grid-template-columns: 1fr;
    }
    .hero {
        min-height: 240px;
        padding: 60px 16px 40px;
    }
    .hero-title { font-size: 26px; }
    .hero-subtitle { font-size: 13px; }
    .main-content {
        padding: 0 14px 80px;
        margin-top: -30px;
    }
    .kpi-value {
        font-size: 22px;
    }
    .top-bar {
        padding: 10px 14px;
    }
    .uptime-name {
        width: 100px;
    }
}