:root {
    --gap-primary: #1769e0;
    --gap-primary-soft: #eef5ff;
    --gap-text: #172033;
    --gap-muted: #687386;
    --gap-border: #e3e8f0;
    --gap-bg: #f5f7fb;
    --gap-card: #ffffff;
    --gap-danger: #b42318;
    --gap-shadow: 0 8px 24px rgba(30, 49, 84, 0.08);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    background: var(--gap-bg);
    color: var(--gap-text);
    font-family: 'Noto Sans KR', sans-serif;
}
button, select { font: inherit; }
a { color: inherit; }

.gap-topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 16px;
    min-height: 58px;
    padding: 10px max(20px, calc((100% - 1180px) / 2));
    border-bottom: 1px solid rgba(227,232,240,.95);
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(12px);
}
.gap-topbar a { text-decoration: none; font-weight: 600; }
.gap-topbar strong { font-size: 16px; }
.gap-regions { justify-self: end; }

.gap-page {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 30px 0 60px;
}

.gap-hero {
    padding: 32px;
    border: 1px solid var(--gap-border);
    border-radius: 22px;
    background: linear-gradient(135deg, #fff 0%, #eef5ff 100%);
    box-shadow: var(--gap-shadow);
}
.gap-kicker {
    margin: 0 0 7px;
    color: var(--gap-primary);
    font-size: 13px;
    font-weight: 700;
}
.gap-hero h1 {
    margin: 0;
    font-size: clamp(28px, 4vw, 44px);
    letter-spacing: -0.04em;
}
.gap-hero > p:not(.gap-kicker) {
    max-width: 760px;
    margin: 14px 0 0;
    color: var(--gap-muted);
    line-height: 1.7;
}
.gap-status {
    display: inline-flex;
    margin-top: 18px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(23,105,224,.09);
    color: #1454b5;
    font-size: 12px;
    font-weight: 700;
}

.gap-controls {
    display: grid;
    grid-template-columns: 1.1fr 1.1fr 1fr auto;
    gap: 12px;
    margin: 18px 0;
    padding: 18px;
    border: 1px solid var(--gap-border);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 4px 14px rgba(30,49,84,.05);
}
.gap-controls label { display: flex; flex-direction: column; gap: 7px; }
.gap-controls label span { color: var(--gap-muted); font-size: 12px; font-weight: 700; }
.gap-controls select,
.gap-controls button {
    min-height: 44px;
    border-radius: 10px;
}
.gap-controls select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--gap-border);
    background: #fff;
    color: var(--gap-text);
}
.gap-controls button {
    align-self: end;
    min-width: 110px;
    padding: 10px 18px;
    border: 1px solid var(--gap-primary);
    background: var(--gap-primary);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
}

.gap-summary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0,1fr));
    gap: 12px;
    margin-bottom: 18px;
}
.gap-summary > div {
    padding: 18px;
    border: 1px solid var(--gap-border);
    border-radius: 14px;
    background: #fff;
}
.gap-summary span { display: block; margin-bottom: 7px; color: var(--gap-muted); font-size: 12px; }
.gap-summary strong { font-size: 18px; }

.gap-card,
.gap-method {
    margin-bottom: 18px;
    padding: 26px;
    border: 1px solid var(--gap-border);
    border-radius: 18px;
    background: var(--gap-card);
    box-shadow: var(--gap-shadow);
}
.gap-card-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}
.gap-card-heading h2,
.gap-method h2 { margin: 0; font-size: 22px; letter-spacing: -0.03em; }
.gap-help { margin: 0; color: var(--gap-muted); font-size: 12px; }
.gap-message {
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gap-muted);
    text-align: center;
}
.gap-error { color: var(--gap-danger); }

.gap-table-wrap { width: 100%; overflow-x: auto; }
.gap-table { width: 100%; min-width: 980px; border-collapse: collapse; }
.gap-table th {
    padding: 12px 11px;
    border-top: 1px solid var(--gap-border);
    border-bottom: 1px solid var(--gap-border);
    background: #f8fafc;
    color: var(--gap-muted);
    font-size: 12px;
    text-align: left;
}
.gap-table td {
    padding: 15px 11px;
    border-bottom: 1px solid #edf0f5;
    font-size: 13px;
    vertical-align: middle;
}
.gap-table tbody tr { cursor: pointer; }
.gap-table tbody tr:hover { background: #fafcff; }
.gap-rank { width: 44px; color: var(--gap-muted); font-weight: 700; }
.gap-apt strong { display: block; font-size: 14px; }
.gap-apt span { display: block; margin-top: 4px; color: var(--gap-muted); font-size: 11px; }
.gap-price { white-space: nowrap; font-weight: 700; }
.gap-ratio { color: var(--gap-primary); font-weight: 800; }
.gap-sample { color: var(--gap-muted); white-space: nowrap; font-size: 11px; }
.gap-risk-row-high { background: #fffdf8; }
.gap-risk-row-extreme { background: #fff8f7; }
.gap-risk-row-high:hover { background: #fff9eb !important; }
.gap-risk-row-extreme:hover { background: #fff1ef !important; }
.gap-risk-badge {
    display: inline-flex;
    margin-left: 5px;
    padding: 3px 7px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.3;
    vertical-align: 1px;
    white-space: nowrap;
}
.gap-risk-high { background: #fff1cf; color: #915400; }
.gap-risk-extreme { background: #ffe8e4; color: #b42318; }

.gap-mobile-list { display: none; }
.gap-mobile-card {
    display: block;
    padding: 17px;
    border: 1px solid var(--gap-border);
    border-radius: 14px;
    background: #fff;
    text-decoration: none;
}
.gap-mobile-risk-high { border-color: #f0d79a; background: #fffdf8; }
.gap-mobile-risk-extreme { border-color: #efb6ad; background: #fff8f7; }
.gap-mobile-head { display: flex; justify-content: space-between; gap: 12px; }
.gap-mobile-head strong { font-size: 15px; }
.gap-mobile-head span { color: var(--gap-primary); font-weight: 800; }
.gap-mobile-badge { min-height: 0; margin-top: 7px; }
.gap-mobile-badge:empty { display: none; }
.gap-mobile-badge .gap-risk-badge { margin-left: 0; }
.gap-mobile-address { margin: 5px 0 13px; color: var(--gap-muted); font-size: 11px; }
.gap-mobile-metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
.gap-mobile-metrics div { padding: 10px; border-radius: 10px; background: #f8fafc; }
.gap-mobile-metrics span { display: block; margin-bottom: 4px; color: var(--gap-muted); font-size: 10px; }
.gap-mobile-metrics strong { font-size: 12px; }
.gap-mobile-sample { margin: 10px 0 0; color: var(--gap-muted); font-size: 10px; }

.gap-method h2 { margin-bottom: 10px; }
.gap-method p { margin: 8px 0 0; color: var(--gap-muted); font-size: 13px; line-height: 1.75; }

@media (max-width: 800px) {
    .gap-topbar { padding-inline: 16px; font-size: 13px; }
    .gap-page { width: min(100% - 20px, 1180px); padding-top: 16px; }
    .gap-hero { padding: 23px 20px; border-radius: 17px; }
    .gap-controls { grid-template-columns: 1fr 1fr; }
    .gap-controls label:nth-child(3) { grid-column: 1 / 2; }
    .gap-controls button { grid-column: 2 / 3; width: 100%; }
    .gap-summary { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .gap-card, .gap-method { padding: 20px 16px; }
    .gap-card-heading { align-items: flex-start; flex-direction: column; }
    .gap-table-wrap { display: none !important; }
    .gap-mobile-list { display: grid; gap: 10px; }
}

@media (max-width: 520px) {
    .gap-controls { grid-template-columns: 1fr; }
    .gap-controls label:nth-child(3), .gap-controls button { grid-column: auto; }
    .gap-summary { grid-template-columns: 1fr 1fr; gap: 8px; }
    .gap-summary > div { padding: 14px; }
    .gap-summary strong { font-size: 15px; }
    .gap-mobile-metrics { grid-template-columns: 1fr 1fr 1fr; }
}