/* Light theme only, generous whitespace, uncluttered (spec §2).
   Closer to a clean note-taking app than a dense dashboard. */

:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --ink: #23201c;
  --ink-soft: #6b645c;
  --line: #e8e4de;
  --accent: #2f6f4f;
  --accent-soft: #eaf3ee;
  --again: #b4451f;
  --easy: #2f6f4f;
  --warn: #8a6d1f;
  --warn-soft: #fdf6e3;
  --radius: 14px;
  --gap: 1.5rem;
  --maxw: 44rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.25; }
h2 { font-size: 1.6rem; margin: 0 0 var(--gap); }
h3 { font-size: 1.05rem; margin: 2.5rem 0 0.75rem; color: var(--ink-soft); }
p { margin: 0 0 1rem; }
hr { border: 0; border-top: 1px solid var(--line); margin: 1.5rem 0; }

.muted { color: var(--ink-soft); }
.small { font-size: 0.875rem; }
.error { color: var(--again); }

/* ── Gate ─────────────────────────────────────────────── */
.gate {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.gate-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: min(26rem, 100%);
}
.gate-card h1 { margin: 0 0 0.5rem; font-size: 1.75rem; }
.gate-card input { width: 100%; margin-bottom: 1rem; }

/* ── Chrome ───────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 0.75rem 1.25rem;
  padding-top: max(0.75rem, env(safe-area-inset-top));
}
.brand {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}
nav {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: none;
}
nav::-webkit-scrollbar { display: none; }
nav button {
  flex: 0 0 auto;
  background: none;
  border: 0;
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}
nav button.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 5rem;
}

/* ── Controls ─────────────────────────────────────────── */
button {
  font: inherit;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  padding: 0.6rem 1.1rem;
  transition: background 0.12s ease, border-color 0.12s ease;
}
button:hover { border-color: #d6d0c8; }
button:active { transform: translateY(1px); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 500; }
button.primary:hover { background: #275c42; }
button.big { padding: 0.85rem 1.6rem; font-size: 1.05rem; width: 100%; }
button.ghost { background: none; border: 0; color: var(--accent); padding: 0.3rem 0; }
button:disabled { opacity: 0.5; cursor: default; }

input[type=text], input[type=password], input[type=number], input[type=search] {
  font: inherit;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
}
input:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin: 1.25rem 0;
}
.field { display: block; margin-bottom: 1.5rem; }
.field > span { display: block; margin-bottom: 0.35rem; font-weight: 500; }
.field small { display: block; margin-top: 0.35rem; }
.field.checkbox, label.checkbox {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
}
.field.checkbox > span { margin: 0; font-weight: 400; }

/* ── Tiles ────────────────────────────────────────────── */
.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.85rem;
}
.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}
.tile .n { display: block; font-size: 1.9rem; font-weight: 600; line-height: 1.1; }
.tile .l { display: block; font-size: 0.85rem; color: var(--ink-soft); margin-top: 0.15rem; }

.big-stat { font-size: 2.25rem; font-weight: 600; }

/* ── Review card ──────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  margin-bottom: 1.5rem;
}
.review-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}
.badge {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.prompt { font-size: 1.45rem; margin-bottom: 0.5rem; }
.context { font-size: 0.95rem; margin-bottom: 0; }
.italian { font-size: 1.6rem; color: var(--accent); margin-bottom: 0.5rem; }
.note { font-size: 0.9rem; margin: 0.75rem 0 0; }

button.grade { flex: 1; padding: 0.85rem 0.5rem; font-weight: 500; }
button.grade.again { color: var(--again); border-color: #f0d5cb; }
button.grade.easy { color: var(--easy); border-color: #cfe3d8; }
button.tick { font-size: 0.9rem; }
button.tick.done { background: var(--accent-soft); border-color: #cfe3d8; color: var(--accent); }

/* ── Lists ────────────────────────────────────────────── */
.item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.6rem;
}
.item .it { font-weight: 500; }
.item .en { color: var(--ink-soft); font-size: 0.95rem; }
.item .meta { font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.35rem; }

.session-item { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.session-item.locked { opacity: 0.55; }
.chapter-head { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); margin: 1.5rem 0 0.5rem; }

.notice {
  background: var(--warn-soft);
  border: 1px solid #efe1bd;
  color: var(--warn);
  border-radius: var(--radius);
  padding: 0.9rem 1.15rem;
  margin-bottom: 1.25rem;
  font-size: 0.92rem;
}

/* ── Forecast ─────────────────────────────────────────── */
.forecast { display: flex; align-items: flex-end; gap: 0.5rem; height: 6.5rem; }
.fc-day { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 0.35rem; height: 100%; justify-content: flex-end; }
.fc-bar { width: 100%; background: var(--accent-soft); border: 1px solid #cfe3d8; border-radius: 6px 6px 0 0; min-height: 3px; }
.fc-lab { font-size: 0.7rem; color: var(--ink-soft); }

/* ── Tracker grid ─────────────────────────────────────── */
.week { display: grid; grid-template-columns: repeat(7, 1fr); gap: 0.4rem; margin-bottom: 0.4rem; }
.day {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.4rem;
  min-height: 3.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.day .d { font-size: 0.65rem; color: var(--ink-soft); }
.day.today { border-color: var(--accent); }
.dots { display: flex; flex-wrap: wrap; gap: 2px; }
.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; background: var(--line); }
.dot.vocab_review { background: var(--accent); }
.dot.grammar_session { background: #7a5cc0; }
.dot.pimsleur { background: #c08a2e; }
.dot.speaking { background: #2e7fc0; }
.legend { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; font-size: 0.8rem; color: var(--ink-soft); }
.legend span { display: flex; align-items: center; gap: 0.35rem; }

.filters { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.filters input[type=search] { flex: 1; min-width: 14rem; }

.step-opt {
  display: block;
  width: 100%;
  text-align: left;
  margin-bottom: 0.5rem;
}
.step-opt.correct { border-color: var(--easy); background: var(--accent-soft); }
.step-opt.wrong { border-color: var(--again); background: #fbeee9; }
.feedback { margin-top: 1rem; font-weight: 500; }
.feedback.ok { color: var(--easy); }
.feedback.no { color: var(--again); }

.md table { border-collapse: collapse; margin: 1rem 0; }
.md td, .md th { border: 1px solid var(--line); padding: 0.35rem 0.7rem; text-align: left; }
.md code { background: var(--accent-soft); padding: 0.1rem 0.35rem; border-radius: 4px; font-size: 0.9em; }

@media (max-width: 30rem) {
  main { padding: 1.5rem 1rem 4rem; }
  .card { padding: 1.5rem 1.25rem; }
  .prompt { font-size: 1.25rem; }
  .italian { font-size: 1.35rem; }
}