:root {
    color-scheme: light;
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --text: #182230;
    --muted: #667085;
    --border: #d8e0ea;
    --brand: #1769e0;
    --brand-hover: #1257bc;
    --success: #087a55;
    --danger: #b42318;
    --shadow: 0 18px 50px rgba(29, 45, 72, .12);
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0c131d;
    --surface: #121c29;
    --surface-soft: #182535;
    --text: #edf3fa;
    --muted: #a6b5c7;
    --border: #2a3a4d;
    --brand: #6ca7ff;
    --brand-hover: #8bb9ff;
    --success: #51d5a7;
    --danger: #ff8f86;
    --shadow: 0 18px 55px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at 15% 10%, rgba(23, 105, 224, .12), transparent 30rem),
        var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang SC", "Microsoft YaHei", sans-serif;
}

button, input { font: inherit; }

.page-shell {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    padding: 56px 0 28px;
}

.query-card {
    padding: clamp(22px, 5vw, 42px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.page-header,
.input-row,
.action-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.page-header { justify-content: space-between; margin-bottom: 30px; }
h1 { margin: 2px 0 0; font-size: clamp(1.7rem, 4vw, 2.45rem); letter-spacing: -.03em; }
.eyebrow { margin: 0; color: var(--brand); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }

.icon-button {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--surface-soft);
    color: var(--text);
    cursor: pointer;
}

.hero-ip {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 16px;
    padding: 24px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(23, 105, 224, .13), rgba(23, 105, 224, .04));
    border: 1px solid rgba(23, 105, 224, .25);
}
.hero-ip .label { grid-column: 1 / -1; color: var(--muted); font-size: .82rem; }
.hero-ip strong { min-width: 0; font-size: clamp(1.2rem, 4vw, 2rem); overflow-wrap: anywhere; }
.source-badge { align-self: center; padding: 5px 10px; border-radius: 999px; background: var(--surface); color: var(--muted); font-size: .74rem; font-weight: 700; }
.source-badge.corrected { color: var(--success); }

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 18px 0;
}
.result-grid div, .meta-list div {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
}
dt { color: var(--muted); font-size: .78rem; font-weight: 700; }
dd { margin: 7px 0 0; overflow-wrap: anywhere; line-height: 1.55; }

.meta-list { display: grid; gap: 10px; margin: 0; }
.meta-list div { display: grid; grid-template-columns: 130px 1fr; padding: 13px 16px; }
.meta-list dd { margin: 0; }

.query-form { margin-top: 24px; }
.query-form label { display: block; margin-bottom: 8px; font-size: .86rem; font-weight: 700; }
input {
    width: 100%;
    min-width: 0;
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
}
input:focus { outline: 3px solid rgba(23, 105, 224, .18); border-color: var(--brand); }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-soft);
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}
.button:hover { border-color: var(--brand); color: var(--brand); }
.button.primary { height: 46px; border-color: var(--brand); background: var(--brand); color: white; }
.button.primary:hover { background: var(--brand-hover); color: white; }
.button:disabled { opacity: .55; cursor: wait; }
.action-row { flex-wrap: wrap; margin-top: 16px; }
.status-message { min-height: 1.4em; margin: 14px 0 0; color: var(--muted); }
.alert { margin-bottom: 16px; padding: 12px 14px; border-radius: 10px; }
.alert-error { color: var(--danger); background: rgba(180, 35, 24, .08); border: 1px solid rgba(180, 35, 24, .2); }
footer { padding: 12px 20px 30px; color: var(--muted); text-align: center; font-size: .82rem; }

@media (max-width: 640px) {
    body {
        display: flex;
        min-height: 100svh;
        flex-direction: column;
    }

    .page-shell {
        display: flex;
        width: calc(100% - 12px);
        flex: 1;
        align-items: center;
        padding: 6px 0 2px;
    }

    .query-card {
        width: 100%;
        padding: 10px 12px;
        border-radius: 14px;
        box-shadow: 0 8px 28px rgba(29, 45, 72, .1);
    }

    .page-header {
        margin-bottom: 7px;
    }

    .page-header > div {
        display: flex;
        align-items: baseline;
        gap: 8px;
    }

    h1 {
        margin: 0;
        font-size: 1.18rem;
    }

    .eyebrow {
        font-size: .58rem;
        letter-spacing: .11em;
    }

    .icon-button {
        width: 32px;
        height: 32px;
    }

    .hero-ip {
        grid-template-columns: 1fr auto;
        gap: 2px 8px;
        padding: 8px 10px;
        border-radius: 10px;
    }

    .hero-ip .label {
        font-size: .62rem;
    }

    .hero-ip strong {
        font-size: 1.02rem;
    }

    .source-badge {
        padding: 3px 6px;
        font-size: .58rem;
    }

    .result-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 5px;
        margin: 6px 0;
    }

    .result-grid div,
    .meta-list div {
        padding: 7px 8px;
        border-radius: 8px;
    }

    dt {
        font-size: .6rem;
    }

    dd {
        margin-top: 2px;
        font-size: .72rem;
        line-height: 1.25;
    }

    .meta-list {
        gap: 4px;
    }

    .meta-list div {
        grid-template-columns: 66px minmax(0, 1fr);
        gap: 5px;
    }

    .meta-list dt {
        align-self: start;
        padding-top: 1px;
    }

    .meta-list dd {
        margin: 0;
        font-size: .64rem;
    }

    .query-form {
        margin-top: 7px;
    }

    .query-form label {
        margin-bottom: 3px;
        font-size: .64rem;
    }

    .input-row {
        align-items: center;
        gap: 5px;
    }

    input {
        height: 35px;
        padding: 0 9px;
        border-radius: 8px;
        font-size: .7rem;
    }

    .button {
        min-height: 34px;
        padding: 0 7px;
        border-radius: 8px;
        font-size: .67rem;
    }

    .button.primary {
        height: 35px;
        min-width: 54px;
    }

    .action-row {
        flex-wrap: nowrap;
        gap: 5px;
        margin-top: 6px;
    }

    .action-row .button {
        min-width: 0;
        flex: 1 1 0;
        padding: 0 3px;
        font-size: .58rem;
    }

    .status-message:empty {
        display: none;
    }

    .status-message:not(:empty) {
        min-height: 1em;
        margin: 4px 0 0;
        font-size: .62rem;
    }

    .alert {
        margin-bottom: 6px;
        padding: 6px 8px;
        font-size: .67rem;
    }

    footer {
        padding: 2px 8px 6px;
        font-size: .58rem;
    }
}