:root {
  /* Palette */
  --blue-slate: #545e75;
  --cool-sky: #63adf2;
  --icy-blue: #a7cced;
  --dusk-blue: #304d6d;
  --steel-blue: #82a0bc;

  /* Light theme tokens */
  --bg: #e8f0f8;
  --surface: #ffffff;
  --surface-2: #dde9f5;
  --text: #1c2b3d;
  --muted: var(--blue-slate);
  --border: #c8d9ea;
  --accent: var(--dusk-blue);
  --accent-ink: #ffffff;
  --cta: var(--cool-sky);
  --cta-ink: #0f2236;
  --ok: #2f7d4f;
  --ok-bg: #e3f2e8;
  --bad: #b3402f;
  --bad-bg: #f8e4e0;
  --warn: #b35500;
  --blank: var(--steel-blue);
  --radius: 12px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141d29;
    --surface: #1d2b3d;
    --surface-2: #253850;
    --text: #e6eef7;
    --muted: var(--steel-blue);
    --border: #2f4560;
    --accent: var(--icy-blue);
    --accent-ink: #141d29;
    --ok: #6cc28f;
    --ok-bg: #173329;
    --bad: #ec8170;
    --bad-bg: #3a2329;
    --warn: #f8a04a;
    --blank: var(--blue-slate);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---------- Layout ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(12px + env(safe-area-inset-top, 0px)) 20px 12px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 600 1.2rem var(--serif);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.brand::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cta);
}

main {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px calc(48px + env(safe-area-inset-bottom, 0px));
  min-width: 0;
}

/* The verse list lives in a sidebar on wide screens and on the home screen on phones. */
.sidebar { display: none; }

@media (min-width: 900px) {
  .layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    max-width: 1200px;
    margin: 0 auto;
  }
  .sidebar {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 57px;
    height: calc(100vh - 57px);
    padding: 20px 16px 0 20px;
    border-right: 1px solid var(--border);
  }
  .home-library { display: none; }
}

.sidebar-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.sidebar-head h2 { margin: 0; }
.sidebar .search { margin-bottom: 12px; padding: 9px 12px; }
.sidebar .verse-list {
  flex: 1;
  overflow-y: auto;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 2px 4px 24px 2px;
  margin-right: -4px;
}
.compact .card { padding: 10px 12px; }
.compact .card-text { -webkit-line-clamp: 1; font-size: 0.92rem; }
.compact .tags { display: none; }
.card.active { border-color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }

.welcome {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 20px;
}
.welcome p { margin: 0 0 20px; max-width: 46ch; }

.install-card {
  background: var(--surface-2);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 28px;
}
.install-card p { margin: 6px 0 12px; font-size: 0.92rem; }
.install-card p:last-child { margin-bottom: 0; }

h1, h2 { font-family: var(--serif); font-weight: 600; margin: 0 0 12px; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }

.muted { color: var(--muted); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: 500 0.95rem var(--sans);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.05s, background 0.15s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, black); }
.btn-cta { background: var(--cta); border-color: var(--cta); color: var(--cta-ink); font-weight: 600; }
.btn-cta:hover { background: color-mix(in srgb, var(--cta) 88%, black); }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-danger { color: var(--bad); }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }
.icon-btn { padding: 6px; color: var(--muted); }
.icon-btn:hover { color: var(--text); }
.btn-block { width: 100%; padding: 14px; font-size: 1rem; }

/* ---------- Home ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
@media (max-width: 480px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.stat b { display: block; font: 600 1.5rem var(--serif); }
.stat span { font-size: 0.8rem; color: var(--muted); }

.review-cta { margin-bottom: 28px; }

.search {
  width: 100%;
  margin-bottom: 14px;
}

.list { display: grid; gap: 10px; }

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  transition: border-color 0.15s;
}
.card:hover { border-color: var(--accent); }
.card-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; }
.card-ref { font: 600 1rem var(--serif); }
.card-text {
  color: var(--muted);
  font-family: var(--serif);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  white-space: nowrap;
}
.badge-due { background: var(--bad-bg); color: var(--bad); }
.badge-new { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.badge-mastered { background: var(--ok-bg); color: var(--ok); }

.tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.tag { font-size: 0.75rem; color: var(--muted); }
.tag::before { content: "#"; }

.empty {
  text-align: center;
  padding: 40px 20px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
}

.footer-actions { margin-top: 32px; justify-content: center; }

/* ---------- Forms ---------- */

label { display: block; font-weight: 600; font-size: 0.9rem; margin: 16px 0 6px; }
.hint { font-weight: 400; color: var(--muted); }

input[type="text"], input[type="search"], textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
}
select {
  padding: 11px 36px 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23545e75' stroke-width='2'/%3E%3C/svg%3E") no-repeat right 14px center;
  color: var(--text);
  font: inherit;
  appearance: none;
  max-width: 100%;
}
select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.lookup-row select { flex: 1; min-width: 0; }
.lookup-msg { font-size: 0.88rem; margin: 8px 0 0; color: var(--ok); }
.lookup-msg.error { color: var(--bad); }
.lookup-msg a { color: inherit; font-weight: 600; }
.translation {
  font: 600 0.62em var(--sans);
  letter-spacing: 0.04em;
  color: var(--muted);
  vertical-align: 0.2em;
  margin-left: 2px;
}
.notice { font-size: 0.75rem; color: var(--muted); margin: 20px 0 0; line-height: 1.45; }
.settings-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-top: 24px;
}
.settings-card p { margin: 0 0 8px; }
.steps { margin: 0 0 14px; padding-left: 20px; font-size: 0.92rem; }
.steps a { color: var(--accent); font-weight: 600; }

textarea { min-height: 160px; resize: vertical; font-family: var(--serif); font-size: 1.05rem; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

.form-actions { margin-top: 24px; }

/* ---------- Practice ---------- */

.practice-head { margin-bottom: 16px; }
.practice-ref { font: 600 1.5rem var(--serif); margin: 4px 0 0; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow-x: auto;
  margin-bottom: 16px;
  scrollbar-width: none;
}
.tab {
  flex: 1;
  white-space: nowrap;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  font: 500 0.88rem var(--sans);
  cursor: pointer;
}
.tab[aria-selected="true"] { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgb(0 0 0 / 0.08); }

.stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  min-height: 220px;
}

.verse {
  font: 1.3rem/1.75 var(--serif);
  margin: 0;
  word-wrap: break-word;
}
@media (max-width: 480px) { .verse { font-size: 1.15rem; } }

.w { border-radius: 4px; }
.blank {
  display: inline-block;
  vertical-align: baseline;
  height: 0.95em;
  background: var(--blank);
  border-radius: 4px;
  cursor: pointer;
  transform: translateY(0.12em);
}
.peek { background: color-mix(in srgb, var(--accent) 18%, transparent); cursor: pointer; }
.ok { background: var(--ok-bg); color: var(--ok); }
.miss { background: var(--bad-bg); color: var(--bad); text-decoration: underline wavy; text-underline-offset: 4px; }

.stage-tools { margin-top: 18px; }
.mode-help { font-size: 0.85rem; color: var(--muted); margin: 0 0 14px; }

input[type="range"] { flex: 1; accent-color: var(--accent); }

.recall-cover {
  display: grid;
  place-items: center;
  min-height: 170px;
  gap: 12px;
  text-align: center;
}

.score { font: 600 1.1rem var(--serif); margin: 14px 0 8px; }

/* Scramble */
.placed { min-height: 80px; margin-bottom: 18px; padding-bottom: 16px; border-bottom: 1px dashed var(--border); }
.pool { display: flex; flex-wrap: wrap; gap: 8px; }
.chunk {
  font: 1.05rem var(--serif);
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
}
.chunk.wrong { animation: shake 0.3s; border-color: var(--bad); background: var(--bad-bg); }
@keyframes shake {
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Rating */
.rate { margin-top: 20px; }
.rate p { margin: 0 0 8px; font-size: 0.9rem; color: var(--muted); text-align: center; }
.rate-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.rate-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 6px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: 600 0.92rem var(--sans);
  cursor: pointer;
}
.rate-btn small { font-weight: 400; color: var(--muted); font-size: 0.75rem; }
.rate-btn:hover { border-color: var(--accent); }
.rate-btn[data-r="0"] { color: var(--bad); }
.rate-btn[data-r="1"] { color: var(--warn); }
.rate-btn[data-r="2"] { color: var(--ok); }
.rate-btn[data-r="3"] { color: var(--accent); }
.rate-btn.suggested { outline: 2px solid currentColor; outline-offset: -2px; }

/* Done */
.done { text-align: center; padding: 48px 16px; }
.done .big { font-size: 3rem; margin-bottom: 8px; }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  box-shadow: 0 6px 20px rgb(0 0 0 / 0.2);
  z-index: 20;
  max-width: calc(100% - 32px);
}