:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --surface-2: #efede6;
  --text: #1f2328;
  --muted: #5f6670;
  --border: #dedbd2;
  --accent: #2f6f5e;
  --accent-contrast: #ffffff;
  --accent-soft: #dcebe5;
  --warn: #a2551b;
  --warn-soft: #f6e5d6;
  --radius: 12px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 4px 16px rgb(0 0 0 / 0.04);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15181b;
    --surface: #1d2125;
    --surface-2: #262b30;
    --text: #e8e6e1;
    --muted: #a0a7af;
    --border: #343a40;
    --accent: #6cc2a6;
    --accent-contrast: #0e1a16;
    --accent-soft: #1f3a32;
    --warn: #e9a46b;
    --warn-soft: #3d2b1d;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #15181b;
  --surface: #1d2125;
  --surface-2: #262b30;
  --text: #e8e6e1;
  --muted: #a0a7af;
  --border: #343a40;
  --accent: #6cc2a6;
  --accent-contrast: #0e1a16;
  --accent-soft: #1f3a32;
  --warn: #e9a46b;
  --warn-soft: #3d2b1d;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
}

a { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header { border-bottom: 1px solid var(--border); background: var(--surface); }
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.logo { font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.logo span { color: var(--accent); }
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.site-nav a { color: var(--muted); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: 0.93rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }

/* Hero */
.hero { padding: 48px 0 24px; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 8px; letter-spacing: -0.02em; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 640px; margin: 0; }

/* Page title for tools */
.page-head { padding: 32px 0 8px; }
.page-head h1 { margin: 0 0 6px; font-size: clamp(1.5rem, 3.5vw, 2rem); letter-spacing: -0.015em; }
.page-head p { margin: 0; color: var(--muted); max-width: 680px; }

h2 { font-size: 1.2rem; margin: 32px 0 12px; }
h3 { font-size: 1rem; margin: 0 0 8px; }

/* Cards */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
a.card { display: block; color: inherit; text-decoration: none; transition: border-color 0.15s, transform 0.15s; }
a.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card .icon { font-size: 1.6rem; line-height: 1; margin-bottom: 10px; }

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 10px;
}
.badge.ai { background: var(--warn-soft); color: var(--warn); }
.badge.soon { background: var(--surface-2); color: var(--muted); }

/* Forms */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin: 16px 0; box-shadow: var(--shadow); }
.panel > h2:first-child { margin-top: 0; }
label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 4px; }
input, select, textarea {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
textarea { min-height: 140px; resize: vertical; }
.field { margin-bottom: 12px; }
.row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); align-items: end; }

button, .btn {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
  border-radius: 8px;
  padding: 8px 14px;
  text-decoration: none;
  display: inline-block;
}
button.secondary, .btn.secondary { background: transparent; color: var(--accent); }
button.ghost { background: transparent; border-color: var(--border); color: var(--muted); padding: 6px 10px; }
button.ghost:hover { color: var(--warn); border-color: var(--warn); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

/* Lists of editable rows */
.item-row { display: grid; gap: 8px; grid-template-columns: 1fr auto; align-items: end; padding: 12px 0; border-top: 1px solid var(--border); }
.item-row:first-child { border-top: 0; }
.item-row .row { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.93rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.muted { color: var(--muted); }
.note { font-size: 0.88rem; color: var(--muted); }
.notice { background: var(--warn-soft); color: var(--text); border-radius: 8px; padding: 10px 14px; font-size: 0.92rem; }
.empty { color: var(--muted); font-style: italic; }

/* Stats */
.stats { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.stat { background: var(--surface-2); border-radius: 10px; padding: 14px; }
.stat .label { font-size: 0.8rem; color: var(--muted); }
.stat .value { font-size: 1.4rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.pos { color: var(--accent); }
.neg { color: var(--warn); }

.bar { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); }

/* Day plan */
.days { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.day { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px; }
.day h3 { font-size: 0.92rem; display: flex; justify-content: space-between; gap: 8px; }
.day ul { list-style: none; padding: 0; margin: 0; }
.day li { font-size: 0.9rem; padding: 6px 8px; border-radius: 6px; background: var(--surface-2); margin-top: 6px; }
.day li.test { background: var(--warn-soft); font-weight: 600; }
.day li.rest { background: var(--accent-soft); }

/* Flashcards */
.qa { border-top: 1px solid var(--border); padding: 12px 0; }
.qa:first-child { border-top: 0; }
.qa details summary { cursor: pointer; color: var(--accent); font-size: 0.9rem; margin-top: 4px; }

footer { color: var(--muted); font-size: 0.85rem; padding: 40px 0; }

@media print {
  .site-header, footer, .no-print, .actions { display: none !important; }
  body { background: #fff; color: #000; }
  .panel, .card, .day { box-shadow: none; border-color: #ccc; }
}