:root {
    color-scheme: light;
    --page: #f9f9f7;
    --surface: #fcfcfb;
    --ink: #0b0b0b;
    --ink-2: #52514e;
    --muted: #898781;
    --grid: #e1e0d9;
    --axis: #c3c2b7;
    --border: rgba(11, 11, 11, 0.10);
    --series: #2a78d6;
    --series-wash: rgba(42, 120, 214, 0.10);
    --accent: #2a78d6;
    --accent-ink: #ffffff;
    --good: #0ca30c;
    --warning: #fab219;
    --critical: #d03b3b;
    --critical-ink: #b42f2f;
    --track: #ecebe6;
    --track-strong: #e1e0d9;
    --shadow: 0 1px 2px rgba(11, 11, 11, 0.04);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --page: #0d0d0d;
        --surface: #1a1a19;
        --ink: #ffffff;
        --ink-2: #c3c2b7;
        --muted: #898781;
        --grid: #2c2c2a;
        --axis: #383835;
        --border: rgba(255, 255, 255, 0.10);
        --series: #3987e5;
        --series-wash: rgba(57, 135, 229, 0.14);
        --accent: #3987e5;
        --critical-ink: #e66767;
        --track: #2c2c2a;
        --track-strong: #45453f;
        --shadow: none;
    }
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series: #3987e5;
    --series-wash: rgba(57, 135, 229, 0.14);
    --accent: #3987e5;
    --critical-ink: #e66767;
    --track: #2c2c2a;
    --track-strong: #45453f;
    --shadow: none;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--page);
    color: var(--ink);
    font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font-size: 18px; }
h2 { font-size: 15px; }

.muted { color: var(--muted); }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

/* Buttons & inputs */

.btn {
    font: inherit;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 7px 14px;
    cursor: pointer;
    white-space: nowrap;
}
.btn:hover { background: var(--grid); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn.primary { background: var(--accent); border-color: transparent; color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: transparent; background: none; color: var(--ink-2); }
.btn.ghost:hover { background: var(--grid); color: var(--ink); }
.btn.small { padding: 4px 9px; font-size: 13px; }

input {
    font: inherit;
    color: var(--ink);
    background: var(--page);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    width: 100%;
    min-width: 0;
}
input:focus, .btn:focus-visible, .seg button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.form-error { color: var(--critical-ink); margin: 10px 0 0; font-size: 14px; }

/* Sign in */

.signin { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.signin form { width: min(340px, 100%); padding: 24px; display: grid; gap: 8px; }
.signin h1 { margin-bottom: 8px; }
.signin label { font-size: 13px; color: var(--ink-2); }
.signin .btn { margin-top: 8px; }

/* Layout */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 5;
}
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.topbar-actions form { margin: 0; }
#checked { font-size: 13px; }

.page { max-width: 1120px; margin: 0 auto; padding: 24px; display: grid; gap: 20px; }

/* Summary */

.summary { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px 40px; }
.hero-label { font-size: 13px; color: var(--ink-2); }
.hero-value { font-size: 48px; font-weight: 600; line-height: 1.05; letter-spacing: -0.02em; }
.hero-value small { font-size: 20px; font-weight: 500; color: var(--ink-2); letter-spacing: 0; margin-left: 4px; }
.stat { padding-bottom: 6px; }
.stat-value { font-size: 22px; font-weight: 600; }

/* Add form */

.add { padding: 16px 18px; }
.add-fields { display: grid; grid-template-columns: 1.2fr 1fr auto; gap: 12px; align-items: end; margin-top: 10px; }
.add-fields label { display: grid; gap: 4px; }
.add-fields span { font-size: 13px; color: var(--ink-2); }
.add-fields em { font-style: normal; color: var(--muted); }

.notice {
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    font-size: 14px;
}
.notice.error { color: var(--critical-ink); }

/* eSIM cards */

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }

.esim { padding: 16px 18px; display: grid; gap: 12px; align-content: start; }
.esim.spent { background: var(--page); }

.esim-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.esim-title { min-width: 0; }
.esim-title h3 { font-size: 16px; overflow-wrap: anywhere; }
.esim-number { font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--muted); }
.esim-actions { display: flex; gap: 2px; flex-shrink: 0; margin: -4px -8px 0 0; }
.rename { display: flex; gap: 6px; }
.rename input { padding: 5px 8px; }

.remaining { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.remaining-value { font-size: 28px; font-weight: 600; letter-spacing: -0.01em; }
.remaining-value small { font-size: 14px; font-weight: 500; color: var(--ink-2); letter-spacing: 0; margin-left: 2px; }

.status { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2); }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--status); }
.status.good { --status: var(--good); }
.status.warning { --status: var(--warning); }
.status.critical { --status: var(--critical); }

.meter { height: 8px; border-radius: 4px; background: var(--track); overflow: hidden; }
.meter > div { height: 100%; border-radius: 4px; background: var(--status); }
.meter.good { --status: var(--good); }
.meter.warning { --status: var(--warning); }
.meter.critical { --status: var(--critical); }

.meta { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }

.chart-block { border-top: 1px solid var(--grid); padding-top: 12px; display: grid; gap: 8px; }
.chart-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.chart-title { font-size: 13px; color: var(--ink-2); }
.chart { position: relative; height: 150px; }
.chart svg { display: block; overflow: visible; }
.chart-empty { font-size: 13px; color: var(--muted); padding: 6px 0 2px; }

.seg { display: inline-flex; background: var(--track); border-radius: 7px; padding: 2px; }
.seg button {
    white-space: nowrap;
    font: inherit;
    font-size: 12px;
    border: 0;
    background: none;
    color: var(--ink-2);
    padding: 3px 9px;
    border-radius: 5px;
    cursor: pointer;
}
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 0 0 1px var(--border); }

svg text { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }

.tooltip {
    position: fixed;
    z-index: 20;
    pointer-events: none;
    background: var(--surface);
    color: var(--ink);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 13px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    white-space: nowrap;
}
.tooltip b { font-weight: 600; }
.tooltip span { color: var(--ink-2); display: block; font-size: 12px; }

/* Overview */

.overview { padding: 16px 18px; display: grid; gap: 8px; }
.overview .chart { height: 190px; }
.legend { display: flex; gap: 14px; font-size: 13px; color: var(--ink-2); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 10px; height: 10px; border-radius: 2px; background: var(--key); }

/* Used-up and archived lists */

.section-title { font-size: 13px; font-weight: 500; color: var(--ink-2); margin: 4px 0 8px; }
.spent-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; background: var(--grid); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.spent-list li { background: var(--surface); display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 14px; flex-wrap: wrap; }
.spent-list .rename { flex: 1; }
.spent-name { font-weight: 500; }
.spent-list .esim-number { margin-left: 8px; }
.spent-detail { font-size: 13px; color: var(--muted); }
.spent-right { display: flex; align-items: center; gap: 10px; }

/* Archived */

details.archived { font-size: 14px; }
details.archived summary { cursor: pointer; color: var(--ink-2); padding: 4px 0; }
.archived-list { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 1px; background: var(--grid); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.archived-list li { background: var(--surface); display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 14px; }
.archived-list .esim-number { margin-left: 8px; }

@media (max-width: 640px) {
    .topbar { padding: 10px 16px; }
    #checked { display: none; }
    .page { padding: 16px; gap: 16px; }
    .add-fields { grid-template-columns: 1fr; }
    .grid { grid-template-columns: 1fr; }
    .hero-value { font-size: 40px; }
}