/* ============================================================================
   AIRE VLC · Observatorio de calidad atmosférica
   Sistema de diseño — «instrumento científico»
   Paleta de calidad del aire validada con el validador de contraste/CVD:
     · claro  (superficie #FBFAF7): CVD ✓ · visión normal ✓ · contraste ⚠ en
       «moderado» (2,31:1) → mitigado porque toda marca lleva etiqueta visible.
     · oscuro (superficie #0F141D): CVD ✓ · visión normal ✓ · contraste ✓.
     La escala es ORDINAL (escalada de gravedad): la luminosidad desciende de
     forma deliberada, que es lo que da separación bajo daltonismo.
   ========================================================================== */

/* ─────────────────────────  Tokens  ───────────────────────── */

:root {
    color-scheme: dark;

    /* Planos */
    --page: #080B11;
    --surface-1: #0F141D;
    --surface-2: #141B26;
    --surface-3: #1A2231;
    --line: #212B3A;
    --line-soft: #18202C;

    /* Tinta */
    --ink-1: #EDF1F7;
    --ink-2: #A3B0C2;
    --ink-3: #6C7A8D;

    /* Acento de marca (cielo / ozono) */
    --accent: #6BAFEC;
    --accent-soft: rgba(107, 175, 236, .14);
    --accent-line: rgba(107, 175, 236, .32);

    /* Escala de calidad del aire — modo oscuro */
    --aq-bueno: #22B49F;
    --aq-moderado: #D6AF24;
    --aq-insalubre: #C85F22;
    --aq-muy-insalubre: #B62B62;
    --aq-peligroso: #9265DA;
    --aq-nodata: #4A5769;

    /* Cromo de gráfico */
    --grid: #1B2432;
    --axis: #27313F;

    /* Métrica */
    --shell: 1220px;
    --r-sm: 8px;
    --r-md: 14px;
    --r-lg: 22px;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 18px 46px -28px rgba(0, 0, 0, .9);

    /* Tipografía */
    --font-display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
}

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

    --page: #F1EFE8;
    --surface-1: #FBFAF7;
    --surface-2: #FFFFFF;
    --surface-3: #F5F3ED;
    --line: #E2DED2;
    --line-soft: #EDEAE1;

    --ink-1: #12161C;
    --ink-2: #545D6A;
    --ink-3: #868E9B;

    --accent: #1D6AB4;
    --accent-soft: rgba(29, 106, 180, .09);
    --accent-line: rgba(29, 106, 180, .28);

    --aq-bueno: #0F9C8B;
    --aq-moderado: #CBA200;
    --aq-insalubre: #C05517;
    --aq-muy-insalubre: #A11D50;
    --aq-peligroso: #6A3CA0;
    --aq-nodata: #A9B0B9;

    --grid: #E7E3D8;
    --axis: #D3CEC1;

    --shadow: 0 1px 2px rgba(18, 22, 28, .05), 0 20px 44px -30px rgba(18, 22, 28, .35);
}

/* Mapa nivel → color, usado por [data-level] en toda la interfaz */
[data-level="bueno"] { --level: var(--aq-bueno); }
[data-level="moderado"] { --level: var(--aq-moderado); }
[data-level="insalubre"] { --level: var(--aq-insalubre); }
[data-level="muy-insalubre"] { --level: var(--aq-muy-insalubre); }
[data-level="peligroso"] { --level: var(--aq-peligroso); }
[data-level="nodata"] { --level: var(--aq-nodata); }

/* ─────────────────────────  Base  ───────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--page);
    color: var(--ink-1);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; }

button, select, input { font: inherit; color: inherit; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

.hidden { display: none !important; }

.shell {
    width: 100%;
    max-width: var(--shell);
    margin-inline: auto;
    padding-inline: clamp(18px, 4vw, 40px);
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 999;
    padding: 10px 16px;
    border-radius: var(--r-sm);
    background: var(--surface-2);
    border: 1px solid var(--line);
    text-decoration: none;
    transform: translateY(-160%);
    transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* Telón atmosférico: degradado + retícula milimetrada */
.atmosphere {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}
.atmosphere__veil {
    position: absolute;
    inset: -20% -10% auto -10%;
    height: 90vh;
    background:
        radial-gradient(58% 52% at 18% 0%, color-mix(in oklab, var(--aq-bueno) 22%, transparent), transparent 70%),
        radial-gradient(50% 48% at 82% 6%, color-mix(in oklab, var(--accent) 26%, transparent), transparent 72%);
    filter: blur(20px);
    opacity: .5;
}
:root[data-theme="light"] .atmosphere__veil { opacity: .34; }
.atmosphere__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, color-mix(in oklab, var(--ink-3) 12%, transparent) 1px, transparent 1px),
        linear-gradient(to bottom, color-mix(in oklab, var(--ink-3) 12%, transparent) 1px, transparent 1px);
    background-size: 64px 64px;
    -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .55), transparent 62%);
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .55), transparent 62%);
    opacity: .5;
}

/* ─────────────────────────  Tipografía utilitaria  ───────────────────────── */

.eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.display-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(30px, 4.4vw, 46px);
    line-height: 1.08;
    letter-spacing: -.012em;
    margin-block: 10px 12px;
}

/* Cifra protagonista: mono proporcional, nunca la serif (regla de dataviz) */
.hero-number {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: clamp(58px, 9vw, 92px);
    line-height: .92;
    letter-spacing: -.045em;
    font-variant-numeric: proportional-nums;
    color: var(--level, var(--ink-1));
    transition: color .4s ease;
}

/* ─────────────────────────  Cabecera  ───────────────────────── */

.masthead {
    position: sticky;
    top: 0;
    z-index: 40;
    background: color-mix(in oklab, var(--page) 84%, transparent);
    -webkit-backdrop-filter: blur(14px) saturate(150%);
    backdrop-filter: blur(14px) saturate(150%);
    border-bottom: 1px solid var(--line-soft);
}

.masthead__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 74px;
    padding-block: 12px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 13px;
    text-decoration: none;
    color: inherit;
}
.brand__glyph {
    width: 34px;
    height: 34px;
    flex: none;
    color: var(--aq-bueno);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
    font-family: var(--font-display);
    font-size: 25px;
    letter-spacing: -.01em;
}
.brand__name em {
    font-style: italic;
    color: var(--ink-3);
    margin-left: 3px;
}
.brand__tagline {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.masthead__tools { display: flex; align-items: center; gap: 12px; }

.livechip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 7px 14px 7px 11px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface-1);
}
.livechip__pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--level, var(--aq-nodata));
    box-shadow: 0 0 0 0 color-mix(in oklab, var(--level, var(--aq-nodata)) 60%, transparent);
    animation: pulse 2.6s ease-out infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--level, var(--aq-nodata)) 55%, transparent); }
    70%, 100% { box-shadow: 0 0 0 8px transparent; }
}
.livechip__body { display: flex; flex-direction: column; line-height: 1.2; }
.livechip__label {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.livechip__value {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

.sync {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: .02em;
}
.sync__dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--ink-3);
}
.sync[data-state="ok"] .sync__dot { background: var(--aq-bueno); }
.sync[data-state="error"] .sync__dot { background: var(--aq-muy-insalubre); }

.icon { width: 20px; height: 20px; display: block; }

.icon-btn {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--surface-1);
    color: var(--ink-2);
    cursor: pointer;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.icon-btn:hover { color: var(--ink-1); border-color: var(--ink-3); }
.icon-btn .icon--sun { display: none; }
:root[data-theme="light"] .icon-btn .icon--sun { display: block; }
:root[data-theme="light"] .icon-btn .icon--moon { display: none; }

/* Pestañas */
.tabs {
    position: relative;
    display: flex;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs__rule {
    position: absolute;
    inset: auto 0 0 0;
    height: 1px;
    background: var(--line-soft);
}
.tab {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: baseline;
    gap: 9px;
    padding: 12px 16px 15px;
    border: 0;
    background: none;
    color: var(--ink-3);
    cursor: pointer;
    white-space: nowrap;
    transition: color .2s ease;
}
.tab::after {
    content: "";
    position: absolute;
    inset: auto 12px 0 12px;
    height: 2px;
    border-radius: 2px 2px 0 0;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform .28s cubic-bezier(.2, .8, .3, 1);
}
.tab:hover { color: var(--ink-2); }
.tab.is-active { color: var(--ink-1); }
.tab.is-active::after { transform: scaleX(1); }
.tab__num {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .1em;
    color: var(--ink-3);
}
.tab.is-active .tab__num { color: var(--accent); }
.tab__label { font-size: 14.5px; font-weight: 500; letter-spacing: -.005em; }

/* ─────────────────────────  Vistas  ───────────────────────── */

.main { padding-block: clamp(26px, 4vw, 48px) 72px; }

.view { display: grid; gap: clamp(18px, 2.4vw, 26px); }
.view[hidden] { display: none; }
.view.is-active { animation: rise .42s cubic-bezier(.2, .8, .3, 1) both; }
@keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: none; }
}

/* ─────────────────────────  Lectura principal  ───────────────────────── */

.readout {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(20px, 3vw, 44px);
    padding: clamp(24px, 3.4vw, 42px);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    background:
        radial-gradient(120% 130% at 88% -10%, color-mix(in oklab, var(--level, var(--accent)) 13%, transparent), transparent 62%),
        var(--surface-1);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: background .5s ease;
}
.readout::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 2px;
    background: linear-gradient(90deg, var(--level, var(--accent)), transparent 72%);
    opacity: .85;
}

.readout__main { min-width: 0; }
.readout__figure {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-top: 14px;
    flex-wrap: wrap;
}
.hero-unit {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.readout__caption {
    margin-top: 12px;
    max-width: 46ch;
    color: var(--ink-2);
    font-size: 14.5px;
}
.readout__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 18px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 13px 6px 10px;
    border: 1px solid color-mix(in oklab, var(--level, var(--ink-3)) 40%, transparent);
    border-radius: 999px;
    background: color-mix(in oklab, var(--level, var(--ink-3)) 12%, transparent);
    font-size: 12.5px;
    font-weight: 500;
    letter-spacing: .01em;
    color: var(--ink-1);
}
.status-badge__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--level, var(--ink-3));
    flex: none;
}

.chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 13px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface-2);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink-2);
}

.readout__gauge { display: grid; place-items: center; }
.readout__gauge svg { width: clamp(170px, 20vw, 210px); height: auto; }

.readout__advice {
    grid-column: 1 / -1;
    display: flex;
    gap: 14px;
    padding-top: 22px;
    border-top: 1px solid var(--line-soft);
}
.advice__icon { width: 22px; height: 22px; flex: none; color: var(--level, var(--accent)); margin-top: 2px; }
.advice__label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 3px;
}
.advice__text { color: var(--ink-2); max-width: 88ch; font-size: 14.5px; }

/* Variante deporte */
.readout--sport { grid-template-columns: minmax(0, 1.4fr) minmax(240px, .6fr); align-items: center; }
.readout--sport .readout__advice { display: none; }

.window-card {
    padding: 22px 24px;
    border: 1px solid var(--accent-line);
    border-radius: var(--r-md);
    background: var(--accent-soft);
    text-align: center;
}
.window-card__label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.window-card__time {
    font-family: var(--font-mono);
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 500;
    letter-spacing: -.02em;
    margin-block: 8px 6px;
    color: var(--ink-1);
}
.window-card__meta { font-size: 12.5px; color: var(--ink-2); }

/* ─────────────────────────  Paneles  ───────────────────────── */

.panel {
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    background: var(--surface-1);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.panel__head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.6vw, 30px);
    border-bottom: 1px solid var(--line-soft);
}
.panel__title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(21px, 2.5vw, 27px);
    letter-spacing: -.01em;
    line-height: 1.2;
}
.panel__sub {
    margin-top: 5px;
    max-width: 62ch;
    font-size: 13.5px;
    color: var(--ink-2);
}
.panel__actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.panel__body { padding: clamp(18px, 2.6vw, 30px); }

.source-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-3);
    padding: 5px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
}

.ghost-btn {
    padding: 7px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: transparent;
    color: var(--ink-2);
    font-size: 12.5px;
    font-weight: 500;
    cursor: pointer;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.ghost-btn:hover { color: var(--ink-1); border-color: var(--ink-3); }
.ghost-btn[aria-expanded="true"] {
    color: var(--ink-1);
    border-color: var(--accent-line);
    background: var(--accent-soft);
}

/* Campos y filtros */
.field { display: flex; flex-direction: column; gap: 5px; }
.field__label {
    font-family: var(--font-mono);
    font-size: 9.5px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.select {
    appearance: none;
    padding: 8px 34px 8px 13px;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    background: var(--surface-2);
    color: var(--ink-1);
    font-size: 13.5px;
    cursor: pointer;
    background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
    background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
}
.select:hover { border-color: var(--ink-3); }

.filters {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    flex-wrap: wrap;
    padding: 16px clamp(18px, 2.6vw, 26px);
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: var(--surface-1);
}
.filters .ghost-btn { margin-left: auto; }

.notice {
    padding: 14px 18px;
    border-radius: var(--r-sm);
    font-size: 13.5px;
    border: 1px solid;
}
.notice--error {
    border-color: color-mix(in oklab, var(--aq-muy-insalubre) 45%, transparent);
    background: color-mix(in oklab, var(--aq-muy-insalubre) 10%, transparent);
    color: var(--ink-1);
    margin-bottom: 16px;
}

/* ─────────────────────────  Gráficos  ───────────────────────── */

.chart { position: relative; margin: 0; }
.chart svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart__caption {
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .02em;
    color: var(--ink-3);
}

/* Cromo del gráfico (hairlines sólidas, recesivas) */
.grid-line { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.axis-line { stroke: var(--axis); stroke-width: 1; shape-rendering: crispEdges; }
.axis-text {
    fill: var(--ink-3);
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-variant-numeric: tabular-nums;
    letter-spacing: .02em;
}
.threshold-line {
    stroke: var(--ink-3);
    stroke-width: 1;
    stroke-dasharray: 4 4;
    opacity: .75;
}
.threshold-label {
    fill: var(--ink-3);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .06em;
}
.series-line {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    stroke-linejoin: round;
    stroke-linecap: round;
}
.series-area { fill: var(--accent); opacity: .1; }
.series-dot { fill: var(--accent); stroke: var(--surface-1); stroke-width: 2; }
.window-band { fill: var(--accent); opacity: .07; }
.window-label {
    fill: var(--ink-3);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.crosshair { stroke: var(--ink-3); stroke-width: 1; opacity: .55; }
.hit-area { fill: transparent; cursor: crosshair; }
.column-mark { transition: opacity .18s ease; }
.chart:hover .column-mark:not(:hover) { opacity: .72; }
.value-label {
    fill: var(--ink-1);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
}

.tooltip {
    position: absolute;
    z-index: 20;
    min-width: 168px;
    padding: 11px 13px;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    background: var(--surface-2);
    box-shadow: 0 14px 34px -18px rgba(0, 0, 0, .8);
    pointer-events: none;
    transform: translate(-50%, -108%);
    font-size: 12.5px;
    line-height: 1.5;
}
.tooltip__time {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.tooltip__value {
    font-family: var(--font-mono);
    font-size: 19px;
    font-weight: 500;
    margin-block: 3px 6px;
}
.tooltip__row {
    display: flex;
    align-items: center;
    gap: 7px;
    color: var(--ink-2);
    font-size: 12px;
}
.tooltip__swatch {
    width: 9px;
    height: 9px;
    border-radius: 2px;
    background: var(--level, var(--ink-3));
    flex: none;
}

/* Vista tabla (gemela accesible de cada gráfico) */
.table-wrap { overflow-x: auto; margin-top: 4px; }
table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}
table.data caption {
    text-align: left;
    padding-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-3);
}
table.data th, table.data td {
    padding: 8px 14px 8px 0;
    text-align: left;
    border-bottom: 1px solid var(--line-soft);
    white-space: nowrap;
}
table.data th {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--ink-3);
}
table.data td { color: var(--ink-2); }
table.data td:first-child { color: var(--ink-1); }
.cell-level { display: inline-flex; align-items: center; gap: 7px; }
.cell-level::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 2px;
    background: var(--level, var(--ink-3));
}

/* Leyendas */
.legend { display: flex; flex-wrap: wrap; gap: 14px; }
.legend__item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 12px;
    color: var(--ink-2);
}
.legend__swatch {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: var(--level, var(--ink-3));
    flex: none;
}
.legend--scale { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line-soft); }

/* ─────────────────────────  Estaciones  ───────────────────────── */

.stations {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 16px;
    transition: opacity .25s ease;
}
.stations[data-refreshing="true"] { opacity: .45; }

.station {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: var(--surface-2);
    transition: border-color .25s ease, transform .25s ease;
}
.station:hover { border-color: color-mix(in oklab, var(--level, var(--ink-3)) 46%, var(--line)); }
.station::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 2px;
    border-radius: var(--r-md) 0 0 var(--r-md);
    background: var(--level, var(--aq-nodata));
}

.station__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.station__name {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -.012em;
    line-height: 1.3;
}
.station__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 7px;
}
.station__meta span {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ink-3);
    padding: 3px 8px;
    border: 1px solid var(--line);
    border-radius: 999px;
}
.station__index {
    text-align: right;
    flex: none;
}
.station__index-value {
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 500;
    letter-spacing: -.03em;
    color: var(--level, var(--ink-1));
    line-height: 1;
}
.station__index-unit {
    display: block;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-top: 4px;
}

.station__flag {
    align-self: flex-start;
    font-family: var(--font-mono);
    font-size: 9.5px;
    letter-spacing: .14em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 999px;
    background: color-mix(in oklab, var(--level, var(--ink-3)) 16%, transparent);
    border: 1px solid color-mix(in oklab, var(--level, var(--ink-3)) 38%, transparent);
    color: var(--ink-1);
}

.readings { display: grid; gap: 11px; }
.reading { display: grid; grid-template-columns: 62px 1fr auto; align-items: center; gap: 12px; }
.reading__name {
    font-family: var(--font-mono);
    font-size: 11.5px;
    font-weight: 500;
    color: var(--ink-2);
    letter-spacing: .02em;
}
.reading__track {
    position: relative;
    height: 6px;
    border-radius: 3px;
    background: color-mix(in oklab, var(--ink-3) 18%, transparent);
    overflow: hidden;
}
.reading__fill {
    position: absolute;
    inset: 0 auto 0 0;
    border-radius: 3px 4px 4px 3px;
    background: var(--level, var(--aq-nodata));
    transition: width .6s cubic-bezier(.2, .8, .3, 1);
}
.reading__guide {
    position: absolute;
    top: -2px;
    bottom: -2px;
    width: 1px;
    background: var(--ink-2);
    opacity: .55;
}
.reading__value {
    font-family: var(--font-mono);
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    color: var(--ink-1);
    white-space: nowrap;
}
.reading__value small { color: var(--ink-3); font-size: 10px; }
.reading--empty { opacity: .42; }

.station__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding-top: 13px;
    border-top: 1px solid var(--line-soft);
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--ink-3);
    letter-spacing: .02em;
}

/* Esqueletos de carga */
.skeleton {
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: var(--surface-2);
    padding: 20px;
    display: grid;
    gap: 14px;
}
.skeleton span {
    display: block;
    height: 10px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--surface-3), var(--line), var(--surface-3));
    background-size: 220% 100%;
    animation: shimmer 1.5s linear infinite;
}
.skeleton span:nth-child(1) { width: 62%; height: 15px; }
.skeleton span:nth-child(2) { width: 40%; }
.skeleton span:nth-child(3) { width: 100%; }
.skeleton span:nth-child(4) { width: 86%; }
.skeleton span:nth-child(5) { width: 72%; }
@keyframes shimmer {
    from { background-position: 120% 0; }
    to { background-position: -120% 0; }
}

/* ─────────────────────────  Tarjetas menores  ───────────────────────── */

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(266px, 1fr));
    gap: 16px;
}
.mini-card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: var(--surface-1);
}
.mini-card__icon { width: 26px; height: 26px; color: var(--accent); margin-bottom: 14px; }
.mini-card h3 {
    font-size: 15.5px;
    font-weight: 600;
    letter-spacing: -.01em;
    margin-bottom: 8px;
}
.mini-card p { font-size: 13.5px; color: var(--ink-2); }

.zones { display: grid; gap: 2px; }
.zone {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 4px;
    border-bottom: 1px solid var(--line-soft);
}
.zone:last-child { border-bottom: 0; }
.zone__mark {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    margin-top: 7px;
    flex: none;
}
.zone[data-kind="good"] .zone__mark { background: var(--aq-bueno); }
.zone[data-kind="avoid"] .zone__mark { background: var(--aq-insalubre); }
.zone strong { display: block; font-size: 14.5px; font-weight: 600; }
.zone span { font-size: 13px; color: var(--ink-2); }

.source-note {
    display: flex;
    gap: 18px;
    padding: clamp(20px, 2.6vw, 28px);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    background: var(--surface-1);
}
.source-note__icon { width: 26px; height: 26px; flex: none; color: var(--accent); margin-top: 2px; }
.source-note h2 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(20px, 2.4vw, 26px);
    letter-spacing: -.01em;
    margin-bottom: 6px;
}
.source-note p { font-size: 14px; color: var(--ink-2); max-width: 86ch; }
.source-note em { font-style: italic; color: var(--ink-1); }

/* Tiles de estadística */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}
.stat {
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: var(--surface-1);
}
.stat__label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
}
/* El valor va en tinta, nunca en el color del dato: el color lo carga el
   medidor o el testigo de nivel que lo acompaña (regla de dataviz). */
.stat__value {
    font-family: var(--font-mono);
    font-size: clamp(26px, 3.4vw, 34px);
    font-weight: 500;
    letter-spacing: -.035em;
    font-variant-numeric: proportional-nums;
    margin-top: 10px;
    line-height: 1.1;
    color: var(--ink-1);
}
.stat__meta .cell-level { color: var(--ink-2); }
.stat__meter {
    height: 5px;
    border-radius: 3px;
    background: color-mix(in oklab, var(--ink-3) 18%, transparent);
    overflow: hidden;
    margin-top: 14px;
}
.stat__meter span {
    display: block;
    height: 100%;
    width: 0;
    border-radius: 3px;
    background: var(--level, var(--aq-bueno));
    transition: width .8s cubic-bezier(.2, .8, .3, 1);
}
.stat__meta { margin-top: 10px; font-size: 12.5px; color: var(--ink-2); }

/* ─────────────────────────  Calendario  ───────────────────────── */

.calendar { --cell: 15px; --cell-gap: 3px; }
.calendar[aria-busy="true"] { opacity: .4; }
.calendar__scroll { overflow-x: auto; padding-bottom: 8px; }
/* Ambas filas comparten ancho, así que se centran juntas cuando sobra sitio
   y arrancan pegadas a la izquierda cuando el año entero desborda. */
.calendar__months, .calendar__body { width: var(--cal-w, max-content); margin-inline: auto; }
.calendar__months { position: relative; height: 16px; }
.calendar__month {
    position: absolute;
    top: 0;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.calendar__body { display: flex; gap: 8px; min-width: max-content; }
.calendar__weekdays {
    display: grid;
    grid-template-rows: repeat(7, var(--cell));
    gap: var(--cell-gap);
    width: 26px;
    font-family: var(--font-mono);
    font-size: 9.5px;
    color: var(--ink-3);
}
.calendar__weekdays span { line-height: var(--cell); }
.calendar__grid {
    display: grid;
    grid-template-rows: repeat(7, var(--cell));
    grid-auto-flow: column;
    grid-auto-columns: var(--cell);
    gap: var(--cell-gap);
}
.day {
    width: var(--cell);
    height: var(--cell);
    padding: 0;
    border: 0;
    border-radius: max(3px, calc(var(--cell) / 5));
    background: var(--level, var(--aq-nodata));
    cursor: pointer;
    transition: transform .15s ease, box-shadow .15s ease;
}
.day:hover { transform: scale(1.28); }
.day.is-selected {
    box-shadow: 0 0 0 2px var(--surface-1), 0 0 0 3.5px var(--ink-1);
    transform: scale(1.1);
}
.day.is-future { opacity: .3; }
.day.is-blank { visibility: hidden; cursor: default; }

.day-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.day-cell {
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    background: var(--surface-2);
}
.day-cell__name {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    color: var(--ink-3);
}
.day-cell__value {
    font-family: var(--font-mono);
    font-size: 22px;
    font-weight: 500;
    letter-spacing: -.03em;
    margin-block: 7px 8px;
    color: var(--ink-1);
}
.day-cell__value small { font-size: 11px; color: var(--ink-3); letter-spacing: 0; }
.day-cell__level { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--ink-2); }
.day-cell__level::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 2px;
    background: var(--level, var(--ink-3));
}

/* ─────────────────────────  Pie  ───────────────────────── */

.colophon {
    border-top: 1px solid var(--line-soft);
    background: color-mix(in oklab, var(--surface-1) 60%, transparent);
    padding-block: 44px 56px;
}
.colophon__row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}
.colophon__title {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 10px;
}
.colophon__col p { font-size: 13px; color: var(--ink-2); margin-bottom: 8px; }
.colophon__col strong { color: var(--ink-1); font-weight: 500; }
.colophon a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }

/* ─────────────────────────  Adaptativo  ───────────────────────── */

@media (max-width: 900px) {
    .readout, .readout--sport { grid-template-columns: 1fr; }
    .readout__gauge { justify-self: start; }
    .masthead__tools .sync { display: none; }
}

@media (max-width: 640px) {
    body { font-size: 14.5px; }
    .masthead__row { min-height: 62px; }
    .brand__tagline { display: none; }
    .livechip__label { display: none; }
    .panel__head { align-items: flex-start; }
    .filters .ghost-btn { margin-left: 0; }
    .reading { grid-template-columns: 54px 1fr auto; gap: 9px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
        scroll-behavior: auto !important;
    }
}

@media print {
    .masthead__tools, .tabs, .atmosphere, .ghost-btn { display: none !important; }
    .view[hidden] { display: grid !important; }
    body { background: #fff; color: #000; }
}