:root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --surface-muted: #eef1f7;
    --border: rgba(15, 23, 42, 0.1);
    --text: #0f172a;
    --text-muted: #5b6475;
    --accent: #0d9f6e;
    --accent-hover: #0b8a5f;
    --accent-ink: #ffffff;
    --heart: #e5484d;
    --radius: 16px;
    --font: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b0f19;
        --surface: #121a2b;
        --surface-muted: #182238;
        --border: rgba(148, 163, 184, 0.16);
        --text: #f8fafc;
        --text-muted: #94a3b8;
        --accent: #10b981;
        --accent-hover: #34d399;
        --accent-ink: #04130d;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
}

.page {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: 48px 16px 40px;
}

.intro {
    text-align: center;
    margin-bottom: 32px;
}

.heart {
    font-size: 40px;
    color: var(--heart);
    line-height: 1;
    margin-bottom: 12px;
}

.intro h1 {
    font-size: clamp(28px, 6vw, 36px);
    line-height: 1.2;
    margin: 0 0 12px;
}

.intro p {
    margin: 0;
    color: var(--text-muted);
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tab {
    flex: 1 1 140px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
}

.tab small {
    display: block;
    font-weight: 400;
    font-size: 13px;
    color: var(--text-muted);
}

.tab[aria-selected="true"] {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent) inset;
}

.panel {
    display: grid;
    gap: 16px;
}

.status {
    margin: 0;
    padding: 24px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-muted);
    text-align: center;
}

.block {
    padding: 24px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
}

.block h2 {
    font-size: 19px;
    margin: 0 0 6px;
}

.block p {
    margin: 0 0 16px;
    color: var(--text-muted);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px 20px;
    border: 0;
    border-radius: 12px;
    background: var(--accent);
    color: var(--accent-ink);
    font: inherit;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.button:hover {
    background: var(--accent-hover);
}

.fields {
    display: grid;
    gap: 10px;
    margin: 0;
}

.field {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 4px 12px;
    padding: 12px 14px;
    border-radius: 10px;
    background: var(--surface-muted);
}

.field dt {
    grid-column: 1 / -1;
    font-size: 13px;
    color: var(--text-muted);
}

.field dd {
    margin: 0;
    font-family: var(--mono);
    font-size: 14px;
    word-break: break-all;
}

.copy {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
}

.footer {
    margin-top: 32px;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}