/**
 * Temperature Monitoring Dashboard Styles
 */

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    color-scheme: light;

    --primary-color: #1a1d23;
    --secondary-color: #3498db;
    --success-color: #1a7a3d;
    --warning-color: #b8860b;
    --danger-color: #c0392b;
    --background-color: #eef0f3;
    --card-background: #ffffff;
    --card-border: #d8dbe0;
    --header-background: #1a1d23;
    --text-color: #1a1d23;
    --text-muted: #5b6270;
    --border-color: #d8dbe0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.15);

    /* Dedicated background for solid, white-text buttons (e.g. .btn-primary).
       --secondary-color itself isn't used here because its dark-mode value
       (#4da3ff) is too light for white text to meet WCAG AA contrast. This
       value (#1565c0) gives ~5.7:1 contrast with white. */
    --btn-primary-bg: #1565c0;

    /* Dedicated background for solid, white-text danger surfaces (e.g.
       .login-error). Same red hue as --danger-color's light value, verified
       at ~5.4:1 contrast with white in both themes; kept separate from
       --danger-color because that variable is also used as a *foreground*
       text/icon color, where the dark-mode value (#ff6b6b) is intentionally
       brighter for legibility against dark backgrounds. */
    --danger-bg-solid: #c0392b;

    --severity-critical-bg: #ffebee;
    --severity-critical-border: #d32f2f;
    --severity-error-bg: #fff3e0;
    --severity-error-border: #f57c00;
    --severity-warning-bg: #fff9c4;
    --severity-warning-border: #fbc02d;
    --severity-info-bg: #e3f2fd;
    --severity-info-border: #1976d2;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;

        --primary-color: #f5f6f8;
        --secondary-color: #4da3ff;
        --success-color: #6fcf87;
        --warning-color: #f4c430;
        --danger-color: #ff6b6b;
        --background-color: #0e0f12;
        --card-background: #1a1d23;
        --card-border: #333842;
        --header-background: #000000;
        --text-color: #f5f6f8;
        --text-muted: #9aa0ab;
        --border-color: #333842;
        --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
        --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.5);

        --btn-primary-bg: #2b6cb0;
        --danger-bg-solid: #c0392b;

        --severity-critical-bg: #3a1418;
        --severity-critical-border: #d32f2f;
        --severity-error-bg: #3a2414;
        --severity-error-border: #f57c00;
        --severity-warning-bg: #3a3414;
        --severity-warning-border: #fbc02d;
        --severity-info-bg: #14243a;
        --severity-info-border: #1976d2;
    }
}

:root[data-theme="dark"] {
    color-scheme: dark;

    --primary-color: #f5f6f8;
    --secondary-color: #4da3ff;
    --success-color: #6fcf87;
    --warning-color: #f4c430;
    --danger-color: #ff6b6b;
    --background-color: #0e0f12;
    --card-background: #1a1d23;
    --card-border: #333842;
    --header-background: #000000;
    --text-color: #f5f6f8;
    --text-muted: #9aa0ab;
    --border-color: #333842;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.5);

    --btn-primary-bg: #2b6cb0;
    --danger-bg-solid: #c0392b;

    --severity-critical-bg: #3a1418;
    --severity-critical-border: #d32f2f;
    --severity-error-bg: #3a2414;
    --severity-error-border: #f57c00;
    --severity-warning-bg: #3a3414;
    --severity-warning-border: #fbc02d;
    --severity-info-bg: #14243a;
    --severity-info-border: #1976d2;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background-color: var(--header-background);
    color: white;
    padding: 20px 30px;
    margin: -20px -20px 30px -20px;
    border-radius: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.header-info {
    display: flex;
    gap: 30px;
    align-items: center;
}

.connection-status, .timestamp {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.logout-link {
    font-size: 0.9rem;
    color: white;
    opacity: 0.85;
    text-decoration: underline;
}

.logout-link:hover {
    opacity: 1;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
}

.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.theme-toggle-fixed {
    position: fixed;
    top: 16px;
    right: 16px;
    border-color: var(--border-color);
    color: var(--text-color);
    z-index: 10;
}

/* Status dot indicator — icon-based so it doesn't rely on color alone */
.status-dot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
}

.status-dot.online {
    color: var(--success-color);
}

.status-dot.online::before {
    content: "\2713";
}

.status-dot.offline {
    color: var(--danger-color);
}

.status-dot.offline::before {
    content: "\2715";
}

/* Sections */
section {
    background-color: var(--card-background);
    padding: 25px;
    margin-bottom: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

section h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
}

/* System Status Grid */
.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.status-card {
    background-color: var(--background-color);
    border: 2px solid var(--card-border);
    padding: 20px;
    border-radius: 6px;
    text-align: center;
    border-left: 4px solid var(--secondary-color);
}

.status-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-value {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Sensors Grid */
.sensors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.sensor-card {
    background: var(--card-background);
    color: var(--text-color);
    border: 2px solid var(--card-border);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.sensor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.sensor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.sensor-header h3 {
    font-size: 1.2rem;
    font-weight: 500;
}

.sensor-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
}

.sensor-status-label {
    /* Inherits font-size/weight/color from .sensor-status; only line-height
       needs correcting so the text baseline lines up with the .status-dot icon. */
    line-height: 1;
}

.sensor-temperature {
    text-align: center;
    margin: 20px 0;
}

.temp-value {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

.temp-value.updated {
    animation: highlight 1s;
}

@keyframes highlight {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.temp-unit {
    font-size: 2rem;
    font-weight: 300;
    vertical-align: super;
}

.sensor-metadata {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--card-border);
}

/* Charts */
.chart-controls {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 20px;
}

.chart-controls label {
    font-weight: 500;
}

.chart-controls select {
    padding: 8px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-background);
    color: var(--text-color);
    font-size: 0.95rem;
    cursor: pointer;
}

.btn-refresh {
    padding: 8px 20px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background-color 0.2s;
}

.btn-refresh:hover {
    opacity: 0.9;
}

.chart-container {
    position: relative;
    height: 400px;
    padding: 10px;
}

/* Collectors List */
.collectors-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.collector-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: var(--background-color);
    border: 2px solid var(--card-border);
    border-radius: 6px;
    border-left: 4px solid var(--secondary-color);
}

.collector-name {
    font-weight: 500;
    font-size: 1rem;
}

.collector-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.collector-status.connected {
    color: var(--success-color);
}

.collector-status.disconnected {
    color: var(--danger-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .header-info {
        flex-direction: column;
        gap: 10px;
    }

    .status-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .sensors-grid {
        grid-template-columns: 1fr;
    }

    .chart-container {
        height: 300px;
    }

    .chart-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .chart-controls select,
    .btn-refresh {
        width: 100%;
    }
}

/* Loading state */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    color: var(--text-muted);
}

/* Error state */
.error {
    color: var(--danger-color);
    padding: 15px;
    background-color: rgba(192, 57, 43, 0.1);
    border-left: 4px solid var(--danger-color);
    border-radius: 4px;
}