:root {
    --bg-color: #050816;
    --card-bg: #111827;
    --card-border: #1f2937;
    --accent: #10b981;
    --accent-soft: rgba(16, 185, 129, 0.15);
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --danger: #ef4444;

    /* Colores extra para dashboard */
    --accent-online: #22c55e;
    --accent-stale: #eab308;
    --accent-nodata: #6b7280;
    --accent-disabled: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* ================== FONDO GENERAL ================== */

body {
    min-height: 100vh;
    background: radial-gradient(circle at top, #1f2937 0, #020617 55%);
    color: var(--text-main);
    padding: 16px;
}

/* Monitor: pantalla centrada */
.monitor-body {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dashboard / admin: layout libre */
.dashboard-body {
    display: block;
    min-height: 100vh;
    overflow-y: auto;
    padding: 12px;
}

/* ================== MONITOR CARD (monitor.html) ================== */

.card {
    width: 100%;
    max-width: 420px;
    background: linear-gradient(145deg, #020617, #020617);
    border-radius: 24px;
    padding: 20px 18px;
    box-shadow:
        0 20px 45px rgba(0, 0, 0, 0.7),
        0 0 0 1px rgba(148, 163, 184, 0.05);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.title-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.title {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.status-pill {
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-soft);
    color: var(--accent);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.8);
}

.status-pill.offline {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.status-pill.offline .status-dot {
    background: var(--danger);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.8);
}

.bpm-display {
    margin-top: 10px;
    margin-bottom: 10px;
    text-align: center;
}

.bpm-value {
    font-size: clamp(3rem, 16vw, 4.5rem);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.bpm-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-top: -4px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.info-row span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.dot-separator {
    width: 3px;
    height: 3px;
    border-radius: 999px;
    background: #4b5563;
}

.footer-row {
    margin-top: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.72rem;
    color: var(--text-muted);
}

.refresh-info {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.refresh-dot {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: #22c55e;
}

.error-msg {
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--danger);
    text-align: center;
    min-height: 1em;
}

/* Nota de información debajo del monitor */
.info-note {
    margin-top: 6px;
    font-size: 0.74rem;
    text-align: center;
    color: var(--text-muted);
}



.badge {
    padding: 3px 7px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.3);
}

@media (max-width: 480px) {
    .card {
        border-radius: 18px;
        padding: 18px 14px;
    }
}

/* ================== DASHBOARD ================== */

.layout {
    max-width: 960px;
    margin: 0 auto;
}

.dashboard-header {
    position: sticky;
    top: 0;
    z-index: 10;
    padding-bottom: 8px;
    margin-bottom: 10px;
    background: radial-gradient(circle at top, #1f2937 0, rgba(2,6,23,0.95) 55%);
    backdrop-filter: blur(6px);
}

.dashboard-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.dashboard-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.legend-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    margin-bottom: 10px;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
}

.dot-online { background: var(--accent-online); }
.dot-stale { background: var(--accent-stale); }
.dot-nodata { background: var(--accent-nodata); }
.dot-disabled { background: var(--accent-disabled); }

.grid-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-top: 14px;
}

/* Tarjeta específica de dashboard (separada de .card del monitor) */
.dash-card {
    background: #0b1220;
    border-radius: 16px;
    padding: 14px;
    border: 1px solid var(--card-border);
    box-shadow: 0 14px 30px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dash-card .card-header {
    margin-bottom: 4px;
}

.user-code {
    font-size: 0.95rem;
    font-weight: 600;
}

.user-name {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Estados en dashboard */

.status-online {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-online);
}

.status-online .status-dot {
    background: var(--accent-online);
    box-shadow: 0 0 6px rgba(34,197,94,0.8);
}

.status-stale {
    background: rgba(234, 179, 8, 0.15);
    color: var(--accent-stale);
}

.status-stale .status-dot {
    background: var(--accent-stale);
    box-shadow: 0 0 6px rgba(234,179,8,0.8);
}

.status-nodata {
    background: rgba(107, 114, 128, 0.15);
    color: var(--accent-nodata);
}

.status-nodata .status-dot {
    background: var(--accent-nodata);
    box-shadow: none;
}

.status-disabled {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-disabled);
}

.status-disabled .status-dot {
    background: var(--accent-disabled);
    box-shadow: 0 0 6px rgba(239,68,68,0.8);
}

/* BPM del dashboard */

.bpm {
    font-size: clamp(2.8rem, 11vw, 3.8rem);
    font-weight: 700;
    text-align: center;
    letter-spacing: 0.08em;
    margin-top: 4px;
    margin-bottom: 2px;
}


.bpm-label {
    font-size: 0.7rem;
    text-align: center;
    color: var(--text-muted);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-top: -4px;
}

.info-row-dashboard {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.msg {
    margin-top: 4px;
    font-size: 0.73rem;
    color: var(--text-muted);
}

.msg.warn {
    color: var(--accent-stale);
}

.msg.error {
    color: var(--accent-disabled);
}

.dashboard-footer-card {
    margin-top: 8px;
    display: flex;
    justify-content: flex-end;
}

.dashboard-footer-card a {
    color: #38bdf8;
    text-decoration: none;
    font-size: 0.7rem;
}

.dashboard-footer-card a:hover {
    text-decoration: underline;
}

/* ================== HISTORIAL ================== */

.hist-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.hist-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

#chart_div {
    margin-top: 10px;
    width: 100%;
    height: 420px;
    background: #020617;
    border-radius: 12px;
}

.back-link {
    margin-top: 12px;
    font-size: 0.8rem;
}

a,
a:visited {
    color: #38bdf8;
}

/* selector de rango del historial */

.range-selector {
    margin-top: 8px;
    display: inline-flex;
    gap: 6px;
    flex-wrap: wrap;
}

.range-pill,
.range-pill:link,
.range-pill:visited {
    padding: 4px 8px;
    border-radius: 999px;
    border: 1px solid #4b5563;
    font-size: 0.75rem;
    color: #e5e7eb;
    text-decoration: none;
    background: rgba(15,23,42,0.9);
}

.range-pill.active,
.range-pill.active:link,
.range-pill.active:visited {
    border-color: #38bdf8;
    background: rgba(56,189,248,0.15);
    color: #e0f2fe;
}

.no-data {
    margin-top: 10px;
    font-size: 0.8rem;
    color: #9ca3af;
}

/* Mejorar legibilidad del tooltip de Google Charts */
#chart_div .google-visualization-tooltip,
#chart_div .google-visualization-tooltip span {
    color: #020617 !important;   /* texto oscuro sobre fondo blanco */
    font-weight: 500;
}


/* ================== CREAR USUARIO (ADMIN) ================== */

.admin-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.admin-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.admin-card {
    background: #0b1220;
    border-radius: 18px;
    padding: 16px;
    border: 1px solid var(--card-border);
    box-shadow: 0 14px 30px rgba(0,0,0,0.5);
    max-width: 560px;
    margin-top: 10px;
}

.form-row {
    margin-bottom: 12px;
}

.form-label {
    font-size: 0.85rem;
    margin-bottom: 4px;
    display: block;
}

.form-input {
    width: 100%;
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid #4b5563;
    background: #020617;
    color: var(--text-main);
    font-size: 0.9rem;
}

.form-input[readonly] {
    opacity: 0.9;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 10px;
    border-radius: 999px;
    border: none;
    font-size: 0.8rem;
    cursor: pointer;
    background: #38bdf8;
    color: #0f172a;
}

.btn:hover {
    filter: brightness(1.08);
}

.btn-secondary {
    background: #111827;
    color: var(--text-main);
    border: 1px solid #4b5563;
}

.copy-row {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}

.copy-msg {
    font-size: 0.75rem;
    color: var(--accent);
    margin-top: 2px;
}

.error-text {
    color: var(--danger);
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.info-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ================== RESPONSIVE TIPO APP (MÓVIL) ================== */

@media (max-width: 640px) {

    body.dashboard-body {
        padding: 8px;
    }

    .layout {
        max-width: 100%;
    }

    .dashboard-header {
        padding-top: 4px;
        padding-bottom: 10px;
        margin-bottom: 8px;
    }

    .dashboard-title {
        font-size: 1.2rem;
    }

    .dashboard-subtitle {
        font-size: 0.8rem;
    }

    .legend-text {
        font-size: 0.75rem;
        margin-bottom: 6px;
    }

    .grid-dashboard {
        grid-template-columns: 1fr;   /* UNA columna en celu */
        gap: 10px;
        margin-top: 10px;
    }

    .dash-card {
        border-radius: 18px;
        padding: 12px 12px 10px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.6);
    }

    .bpm {
        font-size: 2.6rem;
    }

    .info-row-dashboard {
        font-size: 0.7rem;
    }

    .dashboard-footer-card a {
        font-size: 0.7rem;
    }

    /* admin crear usuario responsivo */
    .admin-card {
        padding: 12px;
        border-radius: 14px;
    }

    .copy-row {
        flex-direction: column;
        align-items: stretch;
    }

    .copy-row .btn {
        width: 100%;
        justify-content: center;
    }
}