:root {
  --bg: #f4f6f9;
  --bg2: #ffffff;
  --bg3: #f0f2f5;
  --border: rgba(0, 0, 0, 0.08);
  --border2: rgba(0, 0, 0, 0.14);
  --text: #1a1d23;
  --text2: #52596b;
  --text3: #9aa0b0;
  --accent: #2563eb;
  --accent2: #1d4ed8;
  --accent-bg: #eff6ff;
  --green: #16a34a;
  --green-bg: #f0fdf4;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); }

/* Top bar */
.topbar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 700; font-size: 20px; color: var(--text); }
.nav { display: flex; gap: 16px; }
.nav a {
  color: var(--text2);
  font-size: 18px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 6px;
}
.nav a:hover { background: var(--bg3); color: var(--text); }
.nav a.active { color: var(--accent); background: var(--accent-bg); }

/* Main container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px;
}
h1 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
h2 { font-size: 21px; font-weight: 700; margin-bottom: 8px; }
.lead { color: var(--text2); margin-bottom: 24px; font-size: 18px; }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s, transform 0.15s;
  color: var(--text);
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.card.primary { border-left: 3px solid var(--accent); }
.card .desc { color: var(--text2); font-size: 17px; margin-bottom: 10px; }
.card .bullets { list-style: none; padding: 0; margin: 10px 0; }
.card .bullets li {
  font-size: 16px;
  color: var(--text2);
  padding: 4px 0 4px 22px;
  position: relative;
}
.card .bullets li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}
.card .go {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent);
  font-size: 17px;
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid var(--border2);
  background: var(--bg2);
  color: var(--text);
  font-size: 17px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--bg3); border-color: var(--text3); }
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn.primary:hover { background: var(--accent2); border-color: var(--accent2); }
.btn.danger {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 4px;
}
.form-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border2);
  border-radius: 6px;
  font-size: 18px;
  font-family: inherit;
  background: var(--bg2);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.form-input:focus { border-color: var(--accent); }
.form-input[readonly] { background: var(--bg3); color: var(--text2); }

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 17px;
}
.table th, .table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.table th {
  background: var(--bg3);
  font-weight: 600;
  color: var(--text2);
  font-size: 16px;
  white-space: nowrap;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--accent-bg); }
.table input.form-input { padding: 6px 8px; font-size: 16px; }

/* Narrow table: compact padding but still readable */
.table.narrow th, .table.narrow td { padding: 3px 8px; font-size: 16px; }
.table.narrow input.form-input { padding: 5px 8px; font-size: 16px; }
/* Buttons inside narrow tables should match input height */
.table.narrow .btn { padding: 5px 14px; font-size: 16px; }

/* Centered variant for narrow tier-style tables */
.table.centered th, .table.centered td { text-align: center; }
.table.centered input.form-input { text-align: center; }

/* Truncate long cells (e.g. product names) to a single line */
.table td.truncate {
  max-width: 360px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: left;
}
/* Product name: slightly smaller font than other cells */
.table td.product-name { font-size: 13px; }

/* Section */
.section {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

/* File drop */
.dropzone {
  border: 2px dashed var(--border2);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.dropzone:hover, .dropzone.drag {
  background: var(--accent-bg);
  border-color: var(--accent);
}
.dropzone input[type="file"] { display: none; }

/* Flat file cards for /prices — no border/background, hover lift only */
.file-cards .card {
  padding: 14px 12px;
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.file-cards .card:hover, .file-cards .card.drag {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  background: var(--accent-bg);
}
.file-cards .card input[type="file"] { display: none; }
.file-cards .card .title {
  color: #e74c3c;
  font-weight: 700;
  font-size: 18px;
  text-align: center;
  margin-bottom: 4px;
}
.file-cards .card .sub {
  color: var(--text2);
  font-size: 13px;
  text-align: center;
  margin-bottom: 8px;
}
.file-cards .card .hint {
  color: var(--text3);
  font-size: 13px;
}
.file-cards .card .info {
  color: var(--accent);
  font-size: 13px;
  margin-top: 4px;
}

/* Toast */
.toast {
  position: fixed;
  top: 80px;
  right: 24px;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--text);
  color: #fff;
  font-size: 13px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 100;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { background: var(--green); }
.toast.error { background: var(--red); }

/* Utility */
.muted { color: var(--text3); font-size: 16px; }
.mono { font-family: 'IBM Plex Mono', monospace; }
.flex { display: flex; gap: 8px; align-items: center; }
.grow { flex: 1; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }