:root {
  --bg: #f7f5f2;
  --card-bg: #ffffff;
  --text: #2a2420;
  --muted: #8a7f74;
  --border: #e6e0d8;
  --accent: #a6644c;
  --accent-hover: #8f4f3a;
  --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1815;
    --card-bg: #26211d;
    --text: #f1ece5;
    --muted: #a89a8c;
    --border: #3a332c;
    --accent: #d38b6f;
    --accent-hover: #e2a385;
    --error: #ff6b60;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.wrap { max-width: 960px; margin: 0 auto; padding: 24px 16px 64px; }

header h1 { font-size: 1.5rem; margin: 0 0 12px; }

nav { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }

.tab-btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}

.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.card h2 { margin-top: 0; font-size: 1.1rem; }

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.row { display: flex; gap: 14px; flex-wrap: wrap; align-items: end; }

.button-group { display: flex; gap: 8px; align-items: center; }

.skip-rows-label {
  flex-direction: row;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}
.skip-rows-label input { min-width: 60px; padding: 6px 8px; }

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

input, select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  min-width: 140px;
}

button {
  padding: 9px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  height: fit-content;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 0.88rem;
  overflow-x: auto;
  display: block;
}

thead, tbody { display: table; width: 100%; table-layout: fixed; }

th, td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

th { color: var(--muted); font-weight: 600; }

.error { color: var(--error); font-size: 0.85rem; min-height: 1em; margin: 8px 0 0; }

.empty { color: var(--muted); font-size: 0.9rem; }

.delete-btn {
  background: transparent;
  color: var(--error);
  padding: 4px 8px;
  font-size: 0.8rem;
}
.delete-btn:hover { background: var(--error); color: #fff; }

#history-search {
  min-width: 220px;
}

#import-result { margin-top: 14px; font-size: 0.88rem; }
#import-result .summary { font-weight: 600; }
#import-result ul { margin: 8px 0 0; padding-left: 18px; color: var(--muted); }

.preset-group { display: flex; gap: 6px; align-self: flex-end; }
.preset-btn {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 12px;
  font-size: 0.82rem;
}
.preset-btn:hover { background: var(--border); }

.checkbox-group {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}
.checkbox-group legend {
  padding: 0 6px;
  font-size: 0.8rem;
  color: var(--muted);
}
.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text);
}
.checkbox-label input { min-width: auto; }

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}
.stat-card {
  text-align: center;
  padding: 14px 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-label { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }

.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 160px;
  margin-top: 14px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.bar-col {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  min-width: 22px;
  height: 100%;
  flex-shrink: 0;
}
.bar {
  width: 100%;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  min-height: 2px;
}
.bar-label {
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 4px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  max-height: 40px;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 4px;
}
.user-info {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--muted);
}
.user-info a { color: var(--accent); text-decoration: none; }
.user-info a:hover { text-decoration: underline; }

.auth-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  max-width: 420px;
}
.auth-card { width: 100%; }
.auth-card h1 { font-size: 1.2rem; margin: 0 0 4px; }
.auth-card h2 { margin-top: 0; }
.auth-card form { display: flex; flex-direction: column; gap: 12px; }
.auth-card button { margin-top: 4px; }