/* ==========================================================================
   Climate Control – stylesheet (mobile first, light and dark theme)
   ========================================================================== */

:root {
    --bg: #f3f6f9;
    --surface: #ffffff;
    --surface-2: #eef3f7;
    --text: #13212c;
    --muted: #5b6b78;
    --border: #d5dee6;
    --primary: #0b3d5c;
    --primary-text: #ffffff;
    --accent: #1f8aa8;
    --link: #0d5f86;
    --ok: #1d7a46;
    --ok-bg: #e3f4ea;
    --warn: #8a5a00;
    --warn-bg: #fff3d6;
    --danger: #b3261e;
    --danger-bg: #fde7e5;
    --temp: #d9622b;
    --hum: #1f7fbf;
    --bat1: #7b4fc9;
    --bat2: #1d8a5a;
    --bat3: #b8487a;
    --grid: #dfe6ec;
    --shadow: 0 1px 2px rgba(16, 33, 44, .06), 0 2px 8px rgba(16, 33, 44, .06);
    --radius: 12px;
    --focus: 0 0 0 3px rgba(31, 138, 168, .45);
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0d151c;
        --surface: #15212b;
        --surface-2: #1c2a36;
        --text: #e5edf3;
        --muted: #9aabb8;
        --border: #2a3a47;
        --primary: #3aa7c9;
        --primary-text: #06141c;
        --accent: #4fc3d9;
        --link: #7fd0e6;
        --ok: #6fd39b;
        --ok-bg: #143224;
        --warn: #f2c25c;
        --warn-bg: #3a2d0e;
        --danger: #ff8a80;
        --danger-bg: #3d1714;
        --temp: #ff9a62;
        --hum: #6bb8f0;
        --bat1: #b79cf2;
        --bat2: #6fd39b;
        --bat3: #f08fb8;
        --grid: #263541;
        --shadow: none;
        color-scheme: dark;
    }
}

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

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main { flex: 1; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; margin-top: 1.5em; }
h3 { font-size: 1rem; }
p { margin: 0 0 1em; }
a { color: var(--link); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }

:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 4px; }

.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }
main.container { padding-top: 24px; padding-bottom: 48px; }

.muted { color: var(--muted); }
.small { font-size: .875rem; }
.nowrap { white-space: nowrap; }
.lead { font-size: 1.125rem; color: var(--muted); }
.visually-hidden {
    position: absolute !important; width: 1px; height: 1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 10; background: var(--surface); padding: 8px 12px; }
.skip-link:focus { left: 8px; }

.dev-banner {
    background: repeating-linear-gradient(45deg, #ffd54f, #ffd54f 12px, #ffca28 12px, #ffca28 24px);
    color: #3b2c00; text-align: center; font-size: .8rem; padding: 2px 8px;
}

/* --- Header and footer --------------------------------------------------- */

.site-header { background: var(--primary); color: var(--primary-text); }
.header-inner {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 8px 16px; padding-top: 10px; padding-bottom: 10px;
}
.brand { display: flex; align-items: center; gap: 8px; color: inherit; text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.brand-icon { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linejoin: round; }

.main-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 14px; }
.main-nav a, .main-nav .link-button { color: inherit; text-decoration: none; padding: 6px 2px; font-size: .95rem; opacity: .9; }
.main-nav a:hover, .main-nav .link-button:hover { opacity: 1; text-decoration: underline; }
.main-nav a[aria-current] { opacity: 1; font-weight: 600; border-bottom: 2px solid currentColor; }

.inline-form { display: inline; margin: 0; }
.link-button { background: none; border: 0; font: inherit; cursor: pointer; }

.lang-toggle { display: inline-flex; align-items: center; gap: 6px; }
.flag { height: 18px; width: auto; border-radius: 2px; box-shadow: 0 0 0 1px rgba(255, 255, 255, .35); display: block; }
.lang-code { font-size: .8rem; font-weight: 600; }

.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .875rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-top: 16px; padding-bottom: 16px; }
.site-footer a { color: inherit; }

/* --- Building blocks ----------------------------------------------------- */

.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 16px;
}
.narrow { max-width: 440px; margin: 16px auto; }
.narrow-form { max-width: 560px; margin-bottom: 16px; }

.button {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    min-height: 44px; padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
    background: var(--primary); color: var(--primary-text); font: inherit; font-weight: 600;
    text-decoration: none; cursor: pointer;
}
.button:hover { filter: brightness(1.08); }
.button.secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.button.danger { background: var(--danger); color: #fff; }
.button[disabled] { opacity: .5; cursor: not-allowed; }

.badge {
    display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600;
    background: var(--surface-2); color: var(--muted);
}
.badge-online { background: var(--ok-bg); color: var(--ok); }
.badge-offline { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warn-bg); color: var(--warn); }

.flash { padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; border: 1px solid transparent; }
.flash-success { background: var(--ok-bg); color: var(--ok); }
.flash-error { background: var(--danger-bg); color: var(--danger); }
.flash-warning { background: var(--warn-bg); color: var(--warn); }
.flash a { color: inherit; font-weight: 600; }

.breadcrumb { margin-bottom: 8px; font-size: .9rem; }
.breadcrumb a { text-decoration: none; }

.page-head, .section-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; }
.section-head { margin-top: 1.5em; margin-bottom: .75em; }
.section-head h2 { margin: 0; }
.page-head-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.tabs { display: flex; flex-wrap: wrap; gap: 4px; background: var(--surface-2); padding: 4px; border-radius: 10px; }
.tabs a { padding: 6px 12px; border-radius: 8px; text-decoration: none; color: var(--text); font-size: .9rem; }
.tabs a[aria-current] { background: var(--surface); box-shadow: var(--shadow); font-weight: 600; }
.admin-nav { margin-bottom: 20px; width: fit-content; max-width: 100%; }

/* --- Forms --------------------------------------------------------------- */

.form label { display: block; font-weight: 600; margin: 14px 0 4px; }
.form label.checkbox { display: flex; align-items: center; gap: 8px; font-weight: 400; margin: 10px 0; }
.form input[type=text], .form input[type=email], .form input[type=password], .form input[type=tel], .form select,
.dialog select {
    width: 100%; min-height: 44px; padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px;
    background: var(--surface); color: var(--text); font: inherit;
}
.form input[aria-invalid=true] { border-color: var(--danger); }
.form input[type=checkbox], .form input[type=radio] { width: 20px; height: 20px; accent-color: var(--accent); }
.form .button { margin-top: 20px; }
.form fieldset { border: 1px solid var(--border); border-radius: 10px; margin: 18px 0 0; padding: 4px 14px 14px; }
.form legend { font-weight: 700; padding: 0 6px; }
.hint { color: var(--muted); font-size: .875rem; margin: 4px 0 0; }
.field-error { color: var(--danger); font-size: .875rem; margin: 4px 0 0; }
.form-footer { margin: 16px 0 0; text-align: center; }
.input-unit { display: flex; align-items: center; gap: 8px; max-width: 220px; }
.input-unit span { color: var(--muted); }

/* --- Front page ---------------------------------------------------------- */

.hero { padding: 24px 0 8px; max-width: 720px; }
.hero h1 { font-size: 2rem; }
.features { display: grid; gap: 16px; margin-top: 24px; }
.feature h2 { margin-top: .5em; font-size: 1.1rem; }
.feature p { margin: 0; color: var(--muted); }
.feature-icon { width: 36px; height: 36px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.prose { max-width: 720px; }
.prose li { margin-bottom: .4em; }

/* --- Boats --------------------------------------------------------------- */

.boat-grid { display: grid; gap: 16px; }
.boat-card { display: block; color: inherit; text-decoration: none; transition: border-color .15s; }
.boat-card:hover { border-color: var(--accent); }
.boat-card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.boat-card h2 { margin: 0 0 4px; font-size: 1.15rem; }
.mini-readings { display: flex; gap: 20px; font-size: 1.3rem; font-weight: 700; margin: 8px 0; }
.mini-label { display: block; font-size: .75rem; font-weight: 500; color: var(--muted); }
.mini-relays { list-style: none; padding: 0; margin: 0 0 8px; font-size: .9rem; color: var(--muted); }
.mini-relays li[data-state=on] { color: var(--ok); font-weight: 600; }
.empty { text-align: center; }

.status-line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
[data-online="1"] .status-badge { background: var(--ok-bg); color: var(--ok); }
[data-online="0"] .status-badge { background: var(--danger-bg); color: var(--danger); }

.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 12px 0 8px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); }
.tile-label { display: block; font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.tile-value { display: flex; align-items: center; gap: 8px; font-size: 1.6rem; font-weight: 700; }
.tile-alert { border-color: var(--danger); }
.risk-dot { width: 14px; height: 14px; border-radius: 50%; background: var(--muted); flex: none; }
.risk[data-risk=low] .risk-dot { background: var(--ok); }
.risk[data-risk=moderate] .risk-dot { background: #e0a100; }
.risk[data-risk=high] .risk-dot { background: var(--danger); }

/* Relays and the toggle switch */
.relays { display: grid; gap: 12px; }
.relay { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.relay-info { display: flex; align-items: center; gap: 12px; }
.relay-icon { width: 36px; height: 36px; flex: none; fill: none; stroke: var(--muted); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.relay[data-state=on] .relay-icon { stroke: var(--temp); }
.relay[data-type=fan][data-state=on] .relay-icon { stroke: var(--hum); }
.relay-name { margin: 0; font-size: 1.05rem; }
.relay-state { margin: 0; color: var(--muted); font-size: .9rem; }
.relay[data-state=on] .relay-state { color: var(--ok); font-weight: 600; }
.relay[data-state^=pending] .relay-state { color: var(--warn); }
.relay-timer { margin: 0; font-size: .8rem; color: var(--muted); }
.relay-timer:empty { display: none; }

.switch {
    position: relative; flex: none; width: 64px; height: 36px; border-radius: 999px; border: 0; padding: 0;
    background: var(--border); cursor: pointer; transition: background .2s;
}
.switch-thumb {
    position: absolute; top: 4px; left: 4px; width: 28px; height: 28px; border-radius: 50%;
    background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .3); transition: transform .2s;
}
.switch[aria-checked=true] { background: var(--ok); }
.switch[aria-checked=true] .switch-thumb { transform: translateX(28px); }
.switch[disabled] { opacity: .45; cursor: not-allowed; }
.relay[data-state^=pending] .switch { background: #e0a100; }
.relay[data-state^=pending] .switch-thumb { animation: pulse 1s ease-in-out infinite; }
.switch.busy { opacity: .7; pointer-events: none; }
@keyframes pulse { 50% { opacity: .55; } }
@media (prefers-reduced-motion: reduce) {
    .switch, .switch-thumb { transition: none; }
    .relay[data-state^=pending] .switch-thumb { animation: none; }
}

/* Charts */
.charts { display: grid; gap: 16px; }
.chart-card h3 { margin-bottom: 8px; }
.chart { display: block; width: 100%; height: auto; }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .grid-v { stroke-dasharray: 3 4; }
.chart .axis { fill: var(--muted); font-size: 15px; font-family: inherit; }
.chart .line { fill: none; stroke-width: 2.25; stroke-linejoin: round; stroke-linecap: round; }
.chart-temp .line { stroke: var(--temp); }
.chart-hum .line { stroke: var(--hum); }
.chart .line-bat1 { stroke: var(--bat1); }
.chart .line-bat2 { stroke: var(--bat2); }
.chart .line-bat3 { stroke: var(--bat3); }
.chart-legend { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 16px; padding: 0; margin: 8px 0 0; font-size: .875rem; }
.chart-legend li { display: flex; align-items: center; gap: 6px; }
.swatch { width: 16px; height: 4px; border-radius: 2px; flex: none; }
.swatch-bat1 { background: var(--bat1); }
.swatch-bat2 { background: var(--bat2); }
.swatch-bat3 { background: var(--bat3); }
.chart-summary { margin: 8px 0 0; font-size: .875rem; color: var(--muted); }
.chart-empty { color: var(--muted); padding: 24px 0; text-align: center; margin: 0; }

.event-list { list-style: none; padding: 0; margin: 0; }
.event-list li { display: flex; flex-wrap: wrap; gap: 4px 12px; padding: 8px 0; border-bottom: 1px solid var(--border); }
.event-list time { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 9em; }

.alert-rule { margin-top: 12px; }

/* Batteries: status colours (charging = blue, full/good = green, low = yellow, critical = red) */
.battery { --level: var(--muted); }
[data-status=charging] { --level: var(--accent); }
[data-status=full], [data-status=good] { --level: var(--ok); }
[data-status=low] { --level: #e0a100; }
[data-status=critical] { --level: var(--danger); }
.battery[data-status=critical] { border-color: var(--danger); }
.battery[data-status=charging] .battery-status::after { content: " \26A1"; }
.battery-bar { display: block; width: 100%; height: 8px; margin: 6px 0; border-radius: 4px; overflow: hidden; }
.battery-bar .bar-track { fill: var(--surface-2); }
.battery-bar .bar-fill { fill: var(--level); }
.battery-status { display: block; font-weight: 600; color: var(--level); font-size: .9rem; }
.battery[data-status=unknown] .battery-status { font-weight: 400; color: var(--muted); }
.battery-min { display: block; color: var(--muted); font-size: .8rem; }
.battery-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--level, var(--muted)); margin-right: 6px; vertical-align: baseline; }
.mini-batteries { list-style: none; padding: 0; margin: 0 0 8px; font-size: .9rem; display: flex; flex-wrap: wrap; gap: 2px 14px; }
.mini-battery + .mini-battery { margin-left: 10px; }
.battery-settings { border-top: 1px solid var(--border); margin-top: 14px; padding-top: 4px; }
.battery-settings:first-of-type { border-top: 0; }
.battery-settings h3 { margin: 10px 0 0; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }

/* Dialog */
.dialog {
    border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
    background: var(--surface); color: var(--text); max-width: min(440px, calc(100vw - 32px));
}
.dialog::backdrop { background: rgba(5, 15, 22, .55); }
.dialog h2 { margin-top: 0; }
.dialog label { display: block; font-weight: 600; margin: 12px 0 4px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; flex-wrap: wrap; }

/* --- Admin --------------------------------------------------------------- */

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.table { width: 100%; border-collapse: collapse; font-size: .925rem; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--surface-2); }
.table tr:last-child td { border-bottom: 0; }
.row-warning td { background: var(--warn-bg); }

.token-list { display: grid; grid-template-columns: max-content 1fr; gap: 6px 12px; margin: 0; }
.token-list dt { font-weight: 600; }
.token-list dd { margin: 0; overflow-wrap: anywhere; }
.token { font-size: 1rem; user-select: all; }

.serial { font-size: .95rem; letter-spacing: .03em; white-space: nowrap; }
.serial-box { max-width: 560px; margin-bottom: 16px; border-color: var(--accent); }
.serial-box p { margin: 6px 0; }
.serial-label { font-weight: 600; color: var(--muted); }
.serial-large { font-size: 1.6rem; user-select: all; }
.warn-text { color: var(--warn); }
.waiting { margin-bottom: 28px; }
.table td.actions { display: flex; flex-wrap: wrap; gap: 6px; }
.notice {
    padding: 12px 14px; border-radius: 10px; margin: 0 0 16px; border: 1px solid var(--accent);
    background: var(--surface);
}
.notice a { font-weight: 600; }
.field-static { margin: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.field-static-label { font-weight: 600; }
.button-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; }
.export-list { margin: 8px 0 0; padding-left: 20px; }
.export-list li { margin-bottom: 8px; }
.export-list .hint { display: block; }
.danger-zone { border-color: var(--danger); }
.danger-zone h2 { color: var(--danger); }

/* --- Printable customer card and sticker (Admin → Boats → Print card) ---- */

.print-sheet {
    width: 190mm; max-width: 100%; margin-top: 16px; background: #fff; color: #000;
    font-size: 9pt; line-height: 1.35;
}
.print-sheet code { color: #000; background: none; font-size: 10pt; }
.print-sheet h2 { font-size: 11pt; margin: 0 0 2mm; }
.card-pair { display: flex; }
.card-face, .sticker { border: 1px dashed #777; padding: 5mm; box-sizing: border-box; overflow: hidden; }
.card-face { width: 95mm; height: 140mm; }
.card-face + .card-face { border-left: 0; }
.sticker { display: flex; gap: 4mm; align-items: center; width: 90mm; height: 45mm; margin-top: 8mm; }
.sticker .card-qr { margin: 0; }
.card-brand { font-weight: 700; margin: 0 0 2mm; }
.card-small { font-size: 8pt; margin: 1mm 0; }
.card-steps { margin: 0 0 2mm; padding-left: 5mm; }
.card-steps li { margin-bottom: 1.5mm; }
.card-qr { margin: 2mm 0; }
.card-qr .qr { width: 32mm; height: 32mm; display: block; }
.card-qr-small .qr { width: 22mm; height: 22mm; }
.card-wifi { display: grid; grid-template-columns: max-content 1fr; gap: 0 3mm; margin: 0; }
.card-wifi dt { font-weight: 600; }
.card-wifi dd { margin: 0; overflow-wrap: anywhere; }
.card-leds { border-collapse: collapse; width: 100%; margin-bottom: 4mm; }
.card-leds th, .card-leds td { text-align: left; vertical-align: top; padding: 1mm 1mm 1mm 0; border-bottom: 1px solid #ccc; font-size: 8pt; }
.card-leds th { font-weight: 600; white-space: nowrap; }
.led {
    display: inline-block; width: 3mm; height: 3mm; border-radius: 50%; margin-right: 1.5mm;
    vertical-align: -.3mm; border: .2mm solid #333;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
}
.led-green { background: #1db954; }
.led-blue { background: #1f6fe0; }
.led-yellow { background: #f2c200; }
.led-red { background: #d7261e; }
.card-portal { display: flex; gap: 3mm; align-items: center; }
.card-portal p { margin: 0 0 1mm; }
.card-cut-hint { color: #555; }

@page { size: A4 portrait; margin: 10mm; }

@media print {
    .site-header, .site-footer, .dev-banner, .skip-link, .no-print, .flash { display: none !important; }
    body { background: #fff; }
    main.container { padding: 0; margin: 0; max-width: none; }
    .print-sheet { margin: 0; }
}

.pager { display: flex; justify-content: center; align-items: center; gap: 16px; margin-top: 16px; }

/* --- Error pages --------------------------------------------------------- */

.error-page { text-align: center; max-width: 560px; margin: 24px auto; }
.error-status { font-size: 4rem; font-weight: 800; color: var(--accent); margin: 0; line-height: 1; }
.error-illustration { width: min(320px, 100%); height: auto; margin-bottom: 8px; }
.error-illustration .sea { fill: var(--hum); opacity: .35; }
.error-illustration .hull { fill: var(--primary); }
.error-illustration .mast { stroke: var(--text); stroke-width: 2; }
.error-illustration .sail { fill: var(--accent); }
.error-illustration .error-code { fill: var(--accent); font-size: 52px; font-weight: 800; font-family: inherit; }
.error-detail {
    text-align: left; white-space: pre-wrap; font-size: .75rem; background: var(--surface-2);
    padding: 12px; border-radius: 8px; overflow-x: auto;
}

/* --- Larger screens ------------------------------------------------------ */

@media (min-width: 640px) {
    h1 { font-size: 2rem; }
    .features { grid-template-columns: repeat(3, 1fr); }
    .boat-grid { grid-template-columns: repeat(2, 1fr); }
    .tiles { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .relays { grid-template-columns: repeat(2, 1fr); }
    .card { padding: 20px; }
}

@media (min-width: 960px) {
    .boat-grid { grid-template-columns: repeat(3, 1fr); }
    .charts { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 2.5rem; }
}