app/static/styles.css

:root {
    color-scheme: light dark;
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --badge-normal: #15803d;
    --badge-attention: #f97316;
    --badge-warning: #ea580c;
    --badge-alarm: #dc2626;
    --badge-stable: #64748b;
    --badge-rising: #16a34a;
    --badge-falling: #0ea5e9;
    --badge-demo: #7c3aed;
    --muted: #94a3b8;
    --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0f172a;
        --text-color: #e2e8f0;
        --card-bg: #1e293b;
        --border-color: #334155;
        --accent: #3b82f6;
        --accent-hover: #2563eb;
    }
}

* {
    box-sizing: border-box;
}

body.page {
    margin: 0;
    padding: 0 1.5rem;
    font-family: var(--font-sans);
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.site-header {
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.title-block h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin: 0;
}

.subtitle {
    margin: 0;
    font-size: 1rem;
    color: var(--muted);
}

.layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    width: min(1100px, 100%);
    margin: 0 auto;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.alert {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    background: rgba(220, 38, 38, 0.12);
    color: #dc2626;
    font-weight: 600;
}

.alert[hidden] {
    display: none;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.card-header h2 {
    margin: 0;
    font-size: 1.35rem;
}

.level-display {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.level-number {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1;
}

.level-number .unit {
    font-size: 1rem;
    margin-left: 0.25rem;
    color: var(--muted);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--border-color);
    color: var(--text-color);
}

.badge-normal { background: rgba(21, 128, 61, 0.15); color: #15803d; }
.badge-attention { background: rgba(249, 115, 22, 0.18); color: #f97316; }
.badge-warning { background: rgba(234, 88, 12, 0.18); color: #ea580c; }
.badge-alarm { background: rgba(220, 38, 38, 0.18); color: #dc2626; }
.badge-stable { background: rgba(100, 116, 139, 0.18); color: #475569; }
.badge-rising { background: rgba(22, 163, 74, 0.18); color: #16a34a; }
.badge-falling { background: rgba(14, 165, 233, 0.18); color: #0284c7; }
.badge-demo { background: rgba(124, 58, 237, 0.18); color: #7c3aed; }
.badge-muted { background: rgba(148, 163, 184, 0.2); color: #475569; }

.trend-badge {
    font-size: 1.25rem;
    min-width: 3rem;
    justify-content: center;
}

.status-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 1.5rem 0 1rem;
}

.btn {
    border: none;
    border-radius: 999px;
    padding: 0.65rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
}

.btn.primary {
    background: var(--accent);
    color: #fff;
}

.btn.primary:focus-visible,
.btn.primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    outline: 2px solid transparent;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.toggle input {
    width: 2.5rem;
    height: 1.4rem;
    appearance: none;
    background: var(--border-color);
    border-radius: 999px;
    position: relative;
    cursor: pointer;
    transition: background 0.2s ease;
}

.toggle input::after {
    content: "";
    position: absolute;
    top: 0.2rem;
    left: 0.25rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.2s ease;
}

.toggle input:checked {
    background: var(--accent);
}

.toggle input:checked::after {
    transform: translateX(1.05rem);
}

.toggle input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.sparkline {
    margin: 0;
}

.sparkline svg {
    width: 100%;
    height: 120px;
}

.sparkline path {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    stroke-linejoin: round;
    stroke-linecap: round;
}

.sparkline .baseline {
    stroke: rgba(148, 163, 184, 0.3);
    stroke-width: 1;
}

.legend-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.legend-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.legend-label {
    font-weight: 600;
}

.legend-range {
    color: var(--muted);
    font-size: 0.9rem;
}

.hint {
    margin: 0;
    font-size: 0.85rem;
    color: var(--muted);
}

.site-footer {
    margin-top: auto;
    padding-bottom: 2rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.5);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

@media (max-width: 640px) {
    body.page {
        padding: 0 1rem;
    }
    .controls {
        justify-content: space-between;
    }
}