:root {
  --ink: #1d2b27;
  --ink-soft: #55635e;
  --paper: #f7f2e7;
  --card: #fffdf8;
  --line: #e3dccb;
  --forest: #1f4a3f;
  --forest-2: #2f6f5e;
  --marigold: #f3c55b;
  --danger: #b23a2e;
  --accent: var(--forest-2);
  --radius: 14px;
  --shadow: 0 1px 0 rgba(29, 43, 39, 0.04), 0 6px 20px -12px rgba(29, 43, 39, 0.25);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --ink: #ebe6da;
    --ink-soft: #a9b3ae;
    --paper: #141c1a;
    --card: #1c2624;
    --line: #2d3a37;
    --forest: #0f2a24;
    --forest-2: #5fb89c;
    --danger: #e0725f;
    --shadow: 0 6px 20px -12px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 'Atkinson Hyperlegible', system-ui, sans-serif;
}

h1, h2, h3 { font-family: 'Fraunces', Georgia, serif; font-weight: 700; line-height: 1.15; margin: 0 0 0.4em; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -0.01em; }
h2 { font-size: 1.35rem; margin-top: 2rem; }
a { color: var(--forest-2); }
p { margin: 0 0 1em; }

.muted { color: var(--ink-soft); font-weight: 400; }
.small { font-size: 0.88rem; }
.lede { font-size: 1.1rem; color: var(--ink-soft); max-width: 60ch; }
.kicker {
  margin: 0 0 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
}

/* ---- Top bar ---- */
.topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.8rem clamp(1rem, 4vw, 2.5rem);
  background: var(--forest);
  color: #f7f2e7;
  flex-wrap: wrap;
}
.topbar a { color: inherit; text-decoration: none; }
.topbar nav { display: flex; gap: 0.25rem; flex: 1; flex-wrap: wrap; }
.topbar nav a, .who a {
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  opacity: 0.85;
}
.topbar nav a:hover, .who a:hover { opacity: 1; background: rgba(255, 255, 255, 0.08); }
.topbar nav a.active, .who a.active { opacity: 1; background: var(--marigold); color: #1d2b27; font-weight: 700; }
.who { display: flex; align-items: center; gap: 0.5rem; font-size: 0.92rem; }
.linklike { background: none; border: 0; color: inherit; font: inherit; cursor: pointer; opacity: 0.7; padding: 0.35rem 0.5rem; }
.linklike:hover { opacity: 1; text-decoration: underline; }

.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-family: 'Fraunces', Georgia, serif; font-size: 1.2rem; font-weight: 700; text-decoration: none; color: inherit; }
.brand em { font-style: italic; font-weight: 500; color: var(--marigold); }
.brand-mark {
  display: grid; place-items: center;
  width: 2rem; height: 2rem; border-radius: 9px;
  background: var(--marigold); color: var(--forest);
  font-size: 1.2rem;
}

main { max-width: 1080px; margin: 0 auto; padding: 2rem clamp(1rem, 4vw, 2.5rem) 4rem; }

.pagehead { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.actions form { margin: 0; }

/* ---- Cards, forms ---- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.card.narrow { max-width: 460px; }
form.card { display: grid; gap: 0.9rem; }

label { display: grid; gap: 0.3rem; font-weight: 700; font-size: 0.92rem; }
input, select, textarea {
  font: inherit;
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--marigold); outline-offset: 1px; border-color: transparent; }
input[type='color'] { padding: 0.2rem; height: 2.6rem; width: 4rem; }
input[type='radio'], input[type='checkbox'] { width: auto; accent-color: var(--forest-2); }
input.short { width: 6rem; }
.emoji-input { width: 5rem; font-size: 1.3rem; text-align: center; }
textarea.code { font: 13px/1.5 ui-monospace, 'SF Mono', Menlo, monospace; tab-size: 2; }
fieldset { border: 0; padding: 0; margin: 0; }
legend { font-weight: 700; font-size: 0.92rem; margin-bottom: 0.4rem; }

.row { display: flex; gap: 0.9rem; flex-wrap: wrap; align-items: end; }
.row > label { min-width: 0; }
.row > .grow { flex: 1 1 220px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font: inherit; font-weight: 700; font-size: 0.95rem;
  padding: 0.55rem 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  justify-self: start;
}
.btn:hover { border-color: var(--ink-soft); }
.btn.primary { background: var(--forest-2); border-color: var(--forest-2); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); }
.btn.wide { width: 100%; justify-self: stretch; padding: 0.75rem; }

.error { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); padding: 0.6rem 0.8rem; border-radius: 10px; margin: 0; font-weight: 700; }
.success { background: color-mix(in srgb, var(--forest-2) 14%, transparent); color: var(--forest-2); padding: 0.6rem 0.8rem; border-radius: 10px; margin: 0; font-weight: 700; }

.empty {
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  color: var(--ink-soft);
}
.empty form { margin: 0.6rem 0; }

/* ---- Tiles & lists ---- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.8rem; margin: 1rem 0 1.5rem; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; color: var(--ink-soft); text-decoration: none; }
.stat strong { display: block; font-family: 'Fraunces', Georgia, serif; font-size: 2.2rem; color: var(--ink); line-height: 1.1; }
a.stat:hover { border-color: var(--forest-2); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0.9rem; }
.tile {
  display: grid; gap: 0.2rem; justify-items: start;
  padding: 1.1rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 5px solid var(--accent);
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 0.12s ease;
}
.tile:hover { transform: translateY(-2px); }
.tile .avatar { font-size: 2.2rem; line-height: 1; margin-bottom: 0.4rem; }
.tile strong { font-size: 1.1rem; }

.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.list li a {
  display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap;
  padding: 0.8rem 1rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 10px;
  color: var(--ink);
  text-decoration: none;
}
.list li a:hover { border-color: var(--accent); }
.list li a .muted { margin-left: auto; font-size: 0.9rem; }
.list.lessons { counter-reset: lesson; }
.list.lessons li a::before { counter-increment: lesson; content: counter(lesson); font-family: 'Fraunces', Georgia, serif; font-weight: 700; color: var(--accent); min-width: 1.2rem; }
.list.lessons .chip { margin-left: auto; }

.chip { display: inline-block; font-size: 0.78rem; font-weight: 700; padding: 0.15rem 0.55rem; border-radius: 999px; background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--ink); }

.subject-group h2 a { color: var(--ink); text-decoration: none; }
.subject-group .list li a { border-left-color: var(--accent); }

.split { display: grid; grid-template-columns: 1.6fr 1fr; gap: 1.5rem; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }

.checklist { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.35rem; }
.checklist li.done { color: var(--ink-soft); }
.checklist li.done a { text-decoration: line-through; color: inherit; }
.checklist li.done::marker { content: '✓  '; color: var(--forest-2); }

/* Avatar picker */
.avatars { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.avatars legend { width: 100%; }
.avatar-pick { cursor: pointer; }
.avatar-pick input { position: absolute; opacity: 0; pointer-events: none; }
.avatar-pick span { display: grid; place-items: center; width: 2.6rem; height: 2.6rem; font-size: 1.5rem; border-radius: 10px; border: 2px solid transparent; background: var(--paper); }
.avatar-pick input:checked + span { border-color: var(--marigold); background: color-mix(in srgb, var(--marigold) 25%, var(--paper)); }
.avatar-pick input:focus-visible + span { outline: 2px solid var(--forest-2); }

.kid-checks { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.kid-check { display: flex; align-items: center; gap: 0.4rem; font-weight: 400; padding: 0.4rem 0.7rem; border: 1px solid var(--line); border-radius: 999px; cursor: pointer; }
.kid-check:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }

/* Lesson source toggle — no JS needed. */
.source { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.source legend { width: 100%; }
.source label { display: flex; align-items: center; gap: 0.4rem; font-weight: 400; }
form:has(input[name='source'][value='repo']:checked) .when-html,
form:has(input[name='source'][value='html']:checked) .when-repo { display: none; }

.lesson-frame { width: 100%; height: min(75vh, 900px); border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.pager { display: flex; justify-content: space-between; margin-top: 1rem; font-weight: 700; }

/* ---- Login ---- */
body.bare { min-height: 100vh; }
.login { display: grid; grid-template-columns: 1.1fr 1fr; min-height: 100vh; }
.login-art {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: clamp(1.5rem, 4vw, 3rem);
  background:
    radial-gradient(circle at 80% 10%, rgba(243, 197, 91, 0.18), transparent 40%),
    linear-gradient(160deg, #1f4a3f, #163a31 70%);
  color: #f7f2e7;
}
.login-art .brand { font-size: 1.5rem; }
.login-quote { font-family: 'Fraunces', Georgia, serif; font-size: clamp(1.5rem, 3vw, 2.3rem); line-height: 1.25; max-width: 18ch; position: relative; z-index: 1; }
.login-quote span { display: block; margin-top: 0.8rem; font-family: 'Atkinson Hyperlegible', sans-serif; font-size: 1rem; opacity: 0.7; }
.chalk { position: absolute; inset: 0; pointer-events: none; font-family: 'Fraunces', Georgia, serif; color: rgba(247, 242, 231, 0.09); font-size: 3rem; }
.chalk span { position: absolute; }
.chalk span:nth-child(1) { top: 22%; right: 8%; transform: rotate(-8deg); }
.chalk span:nth-child(2) { bottom: 18%; right: 14%; font-size: 4.5rem; transform: rotate(6deg); }
.chalk span:nth-child(3) { top: 55%; left: 55%; }
.chalk span:nth-child(4) { bottom: 8%; left: 10%; font-size: 5rem; }
.login-form { display: grid; place-items: center; padding: 2rem 1rem; }
.login-form .card { width: min(400px, 100%); padding: 2rem; }
.login-form h1 { font-size: 2rem; margin: 0; }
@media (max-width: 760px) {
  .login { grid-template-columns: 1fr; }
  .login-art { min-height: 220px; }
  .login-quote { font-size: 1.3rem; }
}

.center { min-height: 100vh; display: grid; place-content: center; text-align: center; }