:root {
  --bg: #fafaf7;
  --fg: #222;
  --muted: #666;
  --line: #ddd;
  --card: #fff;
  --accent-fg: #fff;
  --error: #a33;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1c1a;
    --fg: #e8e8e4;
    --muted: #a0a09a;
    --line: #3a3b38;
    --card: #242522;
    --accent-fg: #111;
    --error: #e07a7a;
  }
}

/* ---------- themes: accent color and picture colors ---------- */

body, body[data-theme=trail] {
  --accent: #3d6b4f;
  --pic-bg: var(--card);
  --pic-fg: var(--fg);
  --path: #8a7a66;
}
body[data-theme=forest] {
  --accent: #2e6b3a;
  --pic-bg: #f1f6ef;
  --pic-fg: var(--fg);
  --trunk: #7a5a3a;
}
body[data-theme=garden] {
  --accent: #a2457a;
  --pic-bg: #fbf3f7;
  --pic-fg: var(--fg);
  --stem: #4f8a4a;
  --center: #e3b23c;
}
body[data-theme=sky] {
  --accent: #4655a8;
  --pic-bg: #121831;
  --pic-fg: #dfe3f5;
  --star: #f2d36b;
}

@media (prefers-color-scheme: dark) {
  body, body[data-theme=trail] { --accent: #7fb08f; --path: #b8a68e; }
  body[data-theme=forest] { --accent: #6fb37c; --pic-bg: #1e261f; --trunk: #a07a55; }
  body[data-theme=garden] { --accent: #e08cbc; --pic-bg: #2a2127; --stem: #6fae69; }
  body[data-theme=sky] { --accent: #9aa6e8; --pic-bg: #0d1226; }
}

/* ---------- layout ---------- */

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 560px;
  padding: 0 16px 32px;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0 8px;
  border-bottom: 1px solid var(--line);
}
h1 { font-size: 1.25rem; margin: 0; white-space: nowrap; }
h1 a { color: inherit; text-decoration: none; }
h2 { font-size: 1.15rem; margin: 0 0 8px; }
.header-right { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 12px; align-items: baseline; }
#userbar { display: flex; gap: 12px; align-items: baseline; color: var(--muted); font-size: 0.9rem; }

#status { font-size: 0.8rem; color: var(--muted); }
#status.retry, #status.error { color: var(--error); }

main { padding-top: 16px; min-height: 50vh; }

footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 32px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
footer .small { margin-right: 4px; }
.pill { padding: 3px 12px; font-size: 0.85rem; border-radius: 999px; }
.pill.active { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
}

/* ---------- forms and buttons ---------- */

label { display: block; margin: 14px 0 4px; font-weight: 600; font-size: 0.95rem; }
label.radio { font-weight: normal; margin: 6px 0; }
fieldset { border: 0; padding: 0; margin: 14px 0 0; }
legend { font-weight: 600; font-size: 0.95rem; padding: 0; margin-bottom: 4px; }

input:not([type=radio]), textarea {
  width: 100%;
  padding: 8px 10px;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
}
textarea { resize: vertical; }

button, .button {
  display: inline-block;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
}
button[type=submit], .primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
  margin-top: 16px;
}
button:disabled { opacity: 0.6; cursor: default; }
.secondary { margin-top: 16px; background: var(--card); border-color: var(--line); color: var(--fg); }
button.link {
  border: 0;
  background: none;
  padding: 0;
  color: var(--muted);
  text-decoration: underline;
  font-size: inherit;
}
.row { display: flex; gap: 8px; align-items: baseline; }

.notice {
  font-size: 0.9rem;
  padding: 8px 10px;
  border-left: 3px solid var(--muted);
  background: var(--bg);
}
.hint, .small { font-size: 0.85rem; color: var(--muted); margin: 4px 0; }
.small { display: block; }
.error { color: var(--error); min-height: 1em; margin: 8px 0 0; }

.design-note {
  margin-top: 20px;
  padding-top: 4px;
  border-top: 1px dashed var(--line);
}

/* ---------- home ---------- */

.mascot-big { font-size: 2.2rem; line-height: 1; }
.track-cards { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; margin: 12px 0; }
.track-card {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 4px 12px 4px 4px;
}
.track-option { text-align: left; padding: 14px 12px 14px 12px; gap: 12px; }
.track-card-main {
  flex: 1;
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 10px 8px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}
.track-card-text { flex: 1; display: grid; gap: 4px; min-width: 0; }
.small-btn.primary, .small-btn.secondary { margin-top: 0; padding: 6px 14px; }
.bar { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); }

.week-line { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; }
.dots { display: inline-flex; gap: 4px; align-items: center; }
.dot { width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid var(--accent); }
.dot.on { background: var(--accent); }
.dots .extra { font-size: 0.8rem; color: var(--accent); font-weight: 600; }

/* ---------- breadcrumbs ---------- */

.crumbs { display: flex; flex-wrap: wrap; gap: 6px; font-size: 0.9rem; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.crumbs [aria-current] { color: var(--fg); }

/* ---------- track page ---------- */

.track-head { display: flex; gap: 12px; align-items: flex-start; }
.track-head p { margin: 0; }
.week { margin: 12px 0 0; font-size: 0.95rem; }

.view-head { display: flex; align-items: center; justify-content: space-between; margin: 20px 0 8px; }
.toggle { display: inline-flex; }
.toggle a { padding: 4px 12px; font-size: 0.9rem; border: 1px solid var(--line); background: var(--card); color: var(--fg); text-decoration: none; }
.toggle a:first-child { border-radius: 6px 0 0 6px; }
.toggle a:last-child { border-radius: 0 6px 6px 0; border-left: 0; }
.toggle a.active { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.empty { color: var(--muted); }

.log { padding-left: 1.6em; }
.log li { margin-bottom: 14px; }
.log-meta { font-size: 0.8rem; color: var(--muted); }
.words { font-style: italic; }
.log li.new { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

/* ---------- picture ---------- */

.pic-wrap {
  max-height: 70vh;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--pic-bg);
}
.pic { display: block; width: 100%; height: auto; }
.words-label { font-size: 10px; fill: var(--pic-fg); font-style: italic; }
.pic-label { font-size: 10px; fill: var(--pic-fg); opacity: 0.6; }
.landmark { font-size: 16px; }
.mascot { font-size: 24px; }
.future { fill: var(--pic-fg); opacity: 0.25; }
.step { cursor: pointer; outline: none; }
.step:focus .item, .step:hover .item { filter: brightness(1.15); }

/* trail */
.path-ahead { fill: none; stroke: var(--path); stroke-width: 2; stroke-dasharray: 3 5; opacity: 0.5; }
.path-walked { fill: none; stroke: var(--path); stroke-width: 4; stroke-linecap: round; }
.marker { fill: var(--accent); stroke: var(--pic-bg); stroke-width: 2; }
.marker.hollow { fill: var(--pic-bg); stroke: var(--accent); stroke-width: 2.5; }

/* forest */
.trunk { fill: var(--trunk); }
.canopy { fill: var(--accent); }

/* garden */
.stem { stroke: var(--stem); stroke-width: 2; }
.leaf { fill: var(--stem); }
.petal { fill: var(--accent); }
.center { fill: var(--center); }

/* night sky */
.bgstar { fill: #fff; opacity: 0.25; }
.constellation { fill: none; stroke: var(--star); stroke-width: 1; opacity: 0.45; }
.star { fill: var(--star); }
.star.hollow { opacity: 0.6; }

/* new entry */
.step.new .item { animation: pulse 1.2s ease-out 2; transform-box: fill-box; transform-origin: center bottom; }
.mascot.arrive { animation: hop 0.6s ease-out 2; transform-box: fill-box; transform-origin: bottom; }
@keyframes pulse { 0% { transform: scale(1); } 40% { transform: scale(1.5); } 100% { transform: scale(1); } }
@keyframes hop { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.detail { margin-top: 10px; min-height: 1em; }
.detail:not(:empty) {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
}

@media (prefers-reduced-motion: reduce) {
  .step.new .item, .mascot.arrive { animation: none; }
}