/* Toss-inspired light theme — see DESIGN.md */
:root {
  /* Color tokens */
  --bg: #f9fafb;             /* page background (grey50) */
  --surface: #ffffff;        /* card / float surface */
  --surface-soft: #f2f4f6;   /* grey100 — subtle sections */
  --fg: #191f28;             /* grey900 — primary heading */
  --fg-body: #4e5968;        /* grey700 — body */
  --muted: #6b7684;          /* grey600 — caption */
  --muted-2: #8b95a1;        /* grey500 — secondary labels */
  --placeholder: #b0b8c1;    /* grey400 */

  --border: #e5e8eb;         /* grey200 — primary boundary */
  --border-strong: #d1d6db;  /* grey300 — emphasized */

  --accent: #3182f6;         /* Toss Blue */
  --accent-hover: #2272eb;
  --accent-light: #e8f3ff;

  --good: #03b26c;
  --good-bg: rgba(34, 197, 94, 0.15);
  --good-fg: #16a34a;
  --warn: #fe9800;
  --warn-bg: rgba(234, 179, 8, 0.15);
  --warn-fg: #b45309;
  --bad: #f04452;
  --bad-bg: rgba(239, 68, 68, 0.15);
  --bad-fg: #dc2626;

  /* Shadows */
  --sh-1: 0px 1px 3px rgba(0, 0, 0, 0.04);
  --sh-2: 0px 2px 8px rgba(0, 0, 0, 0.04);
  --sh-4: 0px 4px 12px rgba(0, 0, 0, 0.10);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Toss Product Sans", "Tossface", "SF Pro KR", -apple-system,
    BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR",
    Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ───── Top header ───── */
header.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
header.top h1 { color: var(--fg); }
header.top a { color: var(--fg-body); margin-right: 12px; }
header.top a:hover { color: var(--accent); }

/* ───── Container ───── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ───── Headings ───── */
h1 { font-size: 18px; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 22px; font-weight: 700; margin: 0 0 16px; letter-spacing: -0.01em; }
h3 {
  font-size: 17px; font-weight: 700; margin: 0 0 14px;
  letter-spacing: -0.005em;
  color: var(--fg);
}
/* 카드의 직속 첫 h3에만 구간 divider 적용 */
.card > h3:first-child {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin: -2px 0 16px;
}

/* ───── Cards (구간 경계 명확) ───── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 22px;
  margin-bottom: 16px;
  box-shadow: var(--sh-2);
}
.card + .card { margin-top: 16px; }

/* ───── Tables ───── */
table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
th {
  color: var(--muted-2);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.01em;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--border);
}
tbody tr:hover { background: rgba(2, 32, 71, 0.018); }
tr:last-child td { border-bottom: 0; }

/* ───── Inputs ───── */
input, select, textarea {
  font: inherit;
  color: var(--fg);
  background: rgba(0, 23, 51, 0.02);
  border: 1px solid rgba(2, 32, 71, 0.08);
  border-radius: 10px;
  padding: 9px 12px;
  transition: border-color 120ms, background 120ms;
}
input:focus, select:focus, textarea:focus {
  outline: 0;
  border-color: var(--accent);
  background: var(--surface);
}
input::placeholder { color: var(--placeholder); }
input[type="checkbox"], input[type="radio"] {
  accent-color: var(--accent);
  width: 16px; height: 16px;
  padding: 0; border: 0; background: transparent;
}
input[type="file"] { background: transparent; border: 0; padding: 0; }
input[type="datetime-local"], input[type="number"] { padding: 8px 10px; }

/* ───── Buttons ───── */
button {
  font: inherit;
  color: var(--fg-body);
  background: rgba(2, 32, 71, 0.05);
  border: 0;
  border-radius: 10px;
  padding: 9px 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms, opacity 120ms;
}
button:hover { background: rgba(2, 32, 71, 0.08); }
button.primary {
  background: var(--accent);
  color: #ffffff;
}
button.primary:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.danger {
  background: var(--bad-bg);
  color: var(--bad-fg);
}
button.danger:hover { background: rgba(239, 68, 68, 0.22); }

/* ───── Badges ───── */
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
}
.badge.good { background: var(--good-bg); color: var(--good-fg); }
.badge.warn { background: var(--warn-bg); color: var(--warn-fg); }
.badge.bad { background: var(--bad-bg); color: var(--bad-fg); }
.badge.info { background: var(--accent-light); color: var(--accent-hover); }

/* ───── Utility ───── */
.muted { color: var(--muted); }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* ───── Toast ───── */
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: var(--fg);
  color: #ffffff;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--sh-4);
  z-index: 100;
}

/* ───── Tabs ───── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
  overflow-x: auto;
  background: var(--surface);
  padding: 0 4px;
  border-radius: 10px 10px 0 0;
}
.tabs button {
  background: transparent;
  border: 0;
  padding: 12px 16px;
  color: var(--muted-2);
  border-bottom: 2px solid transparent;
  border-radius: 0;
  white-space: nowrap;
  font-weight: 600;
  font-size: 14px;
}
.tabs button:hover { color: var(--fg); background: transparent; }
.tabs button.active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

/* ───── Rank cards (메인) ───── */
.rank-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  transition: border-color 120ms, box-shadow 120ms;
}
.rank-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--sh-2);
}
.rank-num {
  font-size: 22px;
  font-weight: 700;
  width: 52px;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.rank-num.gold { color: #b8860b; }
.rank-num.silver { color: #6b7684; }
.rank-num.bronze { color: #b87333; }

/* 메인 점수 숫자 강조 */
.rank-card > div:last-child {
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* ───── Labels (form) ───── */
label {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}

/* ───── Mobile ───── */
@media (max-width: 600px) {
  .container { padding: 16px 12px 40px; }
  header.top { padding: 12px 16px; }
  .card { padding: 18px 14px; border-radius: 12px; }
  th, td { padding: 8px 6px; font-size: 13px; }
  .tabs button { padding: 10px 12px; font-size: 13px; }
}

/* Honor reduce-motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0ms !important; transition: none !important; }
}