:root,
[data-theme="dark"] {
    --bg: #000000;
    --fg: #ffffff;
    --gray: #888888;
    --gray-dim: #555555;
    --border: #2a2a2a;
    --card-bg: #0a0a0a;
    --card-bg-hover: #111111;
    --green: #4caf50;
    --red: #e53935;
    --amber: #e5a339;
    --radius: 14px;
    --focus-ring: #5ec8f2;
    --skeleton-base: #161616;
    --skeleton-shine: rgba(255, 255, 255, 0.06);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "JetBrains Mono", Consolas, Menlo, monospace;
    color-scheme: dark;
}

[data-theme="light"] {
    --bg: #f5f5f5;
    --fg: #111111;
    --gray: #5a5a5a;
    --gray-dim: #8c8c8c;
    --border: #dcdcdc;
    --card-bg: #ffffff;
    --card-bg-hover: #fbfbfb;
    --green: #2e8b32;
    --red: #c62828;
    --amber: #b5760f;
    --skeleton-base: #ececec;
    --skeleton-shine: rgba(0, 0, 0, 0.05);
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
    min-height: 100vh;
    position: relative;
    transition: background-color 0.25s ease, color 0.25s ease;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--fg);
    color: var(--bg);
    padding: 10px 16px;
    z-index: 100;
    border-radius: 0 0 8px 0;
    font-size: 14px;
    font-weight: 600;
}

.skip-link:focus {
    left: 0;
}

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(var(--skeleton-shine) 1px, transparent 1px),
        linear-gradient(90deg, var(--skeleton-shine) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(10px);
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    gap: 12px;
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.brand-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--gray-dim);
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4);
    transition: background-color 0.3s ease;
    flex-shrink: 0;
}

.brand-dot[data-online="1"] {
    background: var(--green);
    animation: pulse-green 2s infinite;
}

.brand-dot[data-online="0"] {
    background: var(--red);
    animation: pulse-red 2s infinite;
}

@keyframes pulse-green {
    0% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.5); }
    70% { box-shadow: 0 0 0 8px rgba(76, 175, 80, 0); }
    100% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0); }
}

@keyframes pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.5); }
    70% { box-shadow: 0 0 0 8px rgba(229, 57, 53, 0); }
    100% { box-shadow: 0 0 0 0 rgba(229, 57, 53, 0); }
}

.header-status {
    font-size: 13px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.header-indicator {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--gray);
    border: 1px solid var(--border);
    background: var(--card-bg);
    padding: 4px 9px;
    border-radius: 999px;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.header-indicator.is-down {
    color: var(--red);
    border-color: var(--red);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--fg);
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.15s ease, background-color 0.2s ease;
    padding: 0;
}

.theme-toggle:hover {
    border-color: var(--gray);
    transform: translateY(-1px);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-toggle .icon {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 17px;
    height: 17px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
    opacity: 1;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
}

.theme-toggle .icon-moon {
    transform: translate(-50%, -50%) rotate(-90deg) scale(0.4);
    opacity: 0;
}

[data-theme="light"] .theme-toggle .icon-sun {
    transform: translate(-50%, -50%) rotate(90deg) scale(0.4);
    opacity: 0;
}

[data-theme="light"] .theme-toggle .icon-moon {
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
    opacity: 1;
}

.counter-section {
    padding: 64px 0 32px;
    display: flex;
    justify-content: center;
}

.counter-card {
    text-align: center;
    padding: 48px 56px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card-bg);
    min-width: 320px;
    transition: border-color 0.2s ease, background-color 0.25s ease;
}

.counter-label {
    color: var(--gray);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 14px;
}

.counter-value {
    font-size: clamp(48px, 10vw, 84px);
    font-weight: 700;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.counter-sep {
    color: var(--gray-dim);
    margin: 0 8px;
}

#counterMax {
    color: var(--gray);
}

.counter-meta {
    margin-top: 18px;
    color: var(--gray);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-variant-numeric: tabular-nums;
    flex-wrap: wrap;
}

.dot-sep {
    color: var(--gray-dim);
}

.trend {
    display: inline-block;
    font-weight: 700;
    transition: color 0.2s ease;
}

.trend[data-trend="up"] { color: var(--green); }
.trend[data-trend="down"] { color: var(--red); }
.trend[data-trend="none"] { color: var(--gray-dim); }

.trend.nudge-up { animation: nudge-up 0.45s ease; }
.trend.nudge-down { animation: nudge-down 0.45s ease; }

@keyframes nudge-up {
    0% { transform: translateY(0); }
    35% { transform: translateY(-4px); }
    100% { transform: translateY(0); }
}

@keyframes nudge-down {
    0% { transform: translateY(0); }
    35% { transform: translateY(4px); }
    100% { transform: translateY(0); }
}

.capacity-bar {
    margin-top: 16px;
    height: 4px;
    width: 100%;
    border-radius: 999px;
    background: var(--border);
    overflow: hidden;
}

.capacity-bar-fill {
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: var(--focus-ring);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.4s ease;
}

.capacity-bar-fill.is-warning {
    background: var(--amber);
}

.capacity-bar-fill.is-critical {
    background: var(--red);
}

.offline-banner {
    margin-top: 18px;
    color: var(--red);
    font-size: 13px;
    letter-spacing: 0.02em;
    animation: blink-soft 1.6s infinite;
}

@keyframes blink-soft {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.45; }
}

.panel {
    margin: 40px 0;
}

.panel-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.panel-header-row .panel-title {
    margin: 0;
}

.chart-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.panel-title {
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray);
    font-weight: 600;
    margin: 0 0 16px;
}

.panel-note {
    color: var(--gray-dim);
    font-size: 12.5px;
    line-height: 1.6;
    margin-top: 16px;
}

.panel-note code {
    color: var(--gray);
    background: var(--card-bg);
    padding: 1px 5px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11.5px;
}

.tab-group {
    position: relative;
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 3px;
    background: var(--card-bg);
    gap: 2px;
}

.tab-indicator {
    position: absolute;
    top: 3px;
    bottom: 3px;
    left: 3px;
    width: 0;
    border-radius: 999px;
    background: var(--fg);
    transition: left 0.28s cubic-bezier(0.4, 0, 0.2, 1), width 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
}

.tab-indicator.is-instant {
    transition: none;
}

.tab-btn {
    position: relative;
    z-index: 1;
    border: none;
    background: transparent;
    color: var(--gray);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: 0.03em;
    padding: 6px 14px;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.18s ease;
}

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

.tab-btn.is-active {
    color: var(--bg);
}

.chart-buttons {
    display: inline-flex;
    gap: 6px;
}

.icon-btn {
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--gray);
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.04em;
    padding: 7px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.18s ease, color 0.18s ease, transform 0.15s ease;
}

.icon-btn:hover {
    color: var(--fg);
    border-color: var(--gray);
}

.icon-btn:active {
    transform: translateY(1px);
}

.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 12px;
}

.info-card, .stat-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card-bg);
    padding: 18px 20px;
    transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.25s ease;
}

.info-card:hover, .stat-card:hover {
    border-color: var(--gray-dim);
    background: var(--card-bg-hover);
}

.info-label, .stat-label {
    color: var(--gray);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}

.info-value, .stat-value {
    font-size: 24px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    min-height: 1.2em;
}

.info-value-small, .stat-value-small {
    font-size: 14px;
    font-weight: 500;
    color: color-mix(in srgb, var(--fg) 85%, var(--gray));
}

.stats-grid .stat-card {
    text-align: left;
}

[data-skeleton].is-loading {
    color: transparent !important;
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    background: linear-gradient(
        100deg,
        var(--skeleton-base) 30%,
        var(--skeleton-shine) 45%,
        var(--skeleton-base) 60%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
}

@keyframes skeleton-shimmer {
    0% { background-position: 150% 0; }
    100% { background-position: -50% 0; }
}

.chart-wrap {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card-bg);
    padding: 24px 20px 16px;
    height: 360px;
    position: relative;
    transition: background-color 0.25s ease;
}

.chart-wrap-small {
    height: 280px;
    margin-top: 16px;
}

.chart-wrap canvas {
        width: 100% !important;
    height: 100% !important;
    transition: opacity 0.3s ease;
}

.chart-skeleton {
    position: absolute;
    inset: 16px 20px 16px 20px;
    border-radius: 10px;
    background: linear-gradient(
        100deg,
        var(--skeleton-base) 30%,
        var(--skeleton-shine) 45%,
        var(--skeleton-base) 60%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.chart-skeleton.is-visible {
    opacity: 1;
}

@media (max-width: 600px) {
    .chart-wrap {
        height: 280px;
    }
}

.history-form {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.history-label {
    font-size: 13px;
    color: var(--gray);
}

.history-input {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--fg);
    border-radius: 8px;
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 14px;
}

.btn-primary {
    background: var(--fg);
    color: var(--bg);
    border: none;
    border-radius: 8px;
    padding: 9px 18px;
    font-weight: 600;
    font-size: 13.5px;
    cursor: pointer;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn-primary:hover { opacity: 0.85; }
.btn-primary:active { transform: translateY(1px); }

.empty-state {
    color: var(--gray-dim);
    font-size: 13.5px;
    margin-top: 16px;
}

.site-footer {
    text-align: center;
    color: var(--gray-dim);
    font-size: 12px;
    padding: 40px 0 60px;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

.footer-meta {
    margin-top: 6px;
    font-variant-numeric: tabular-nums;
}

.flip {
    display: inline-block;
    animation: flip-num 0.35s ease;
}

@keyframes flip-num {
    0% { transform: translateY(-6px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

@media (max-width: 900px) {
    .container {
        max-width: 100%;
    }
}

@media (max-width: 600px) {
    .counter-card {
        padding: 36px 28px;
        min-width: 0;
        width: 100%;
    }

    .header-inner {
        padding: 14px 16px;
    }

    .header-status,
    .header-indicator {
        display: none;
    }

    .grid-cards {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }

    .info-value, .stat-value {
        font-size: 20px;
    }

    .panel-header-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .tab-group {
        width: 100%;
        justify-content: space-between;
    }

    .tab-btn {
        flex: 1;
        text-align: center;
    }
}

@media (min-width: 601px) and (max-width: 900px) {
    .grid-cards {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }
}