:root {
  --ink: #14202b;
  --ink-soft: #3d4f5f;
  --paper: #f3f0ea;
  --foam: #fffdf8;
  --line: rgba(20, 32, 43, 0.14);
  --accent: #0f7a6e;
  --err: #b42318;
  --font-brand: "Syne", "IBM Plex Sans TC", sans-serif;
  --font-body: "IBM Plex Sans TC", sans-serif;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-underline-offset: 0.18em; text-decoration: underline; }

.banner {
  margin: 0;
  padding: 0.55rem 1rem;
  background: #fff3c4;
  color: #5c4813;
  font-size: 0.86rem;
  text-align: center;
}

.topbar {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
}
.topbar__who { color: var(--ink-soft); }

.stage {
  max-width: 42rem;
  margin: 8vh auto 0;
  padding: 0 1.2rem 4rem;
}
.stage__brand, .album__brand, .calendar__brand {
  letter-spacing: 0.18em;
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.stage__title, .album__title, .calendar__title {
  font-family: var(--font-brand);
  font-size: clamp(2rem, 6vw, 3.4rem);
  margin: 0.2rem 0 0.4rem;
}
.stage__lede, .album__lede, .calendar__lede { color: var(--ink-soft); }
.stage__apps { display: flex; gap: 0.8rem; flex-wrap: wrap; margin: 1.4rem 0; }
.app-tile {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  width: 7.2rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  background: var(--foam);
  color: var(--ink);
  border-radius: 0.9rem;
}
.app-tile:hover { text-decoration: none; border-color: var(--accent); }
.btn, button.btn {
  display: inline-block;
  border: 0;
  border-radius: 999px;
  padding: 0.55rem 1.1rem;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}
.btn--ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }

.wrap { max-width: 56rem; margin: 0 auto; padding: 0 1.2rem 4rem; }
.err { color: var(--err); }
.err[hidden], [hidden] { display: none !important; }

.ai-login {
  max-width: 22rem;
  margin: 12vh auto;
  padding: 1.2rem;
}
.ai-login label { display: block; margin: 0.8rem 0; }
.ai-login input, .album-form input, .cal-form input, .cal-form textarea, select {
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  font: inherit;
  background: #fff;
}

.album-grid, .cal-recent__list { display: grid; gap: 0.8rem; }
.album-card, .cal-item, .app-tile {
  border-radius: 0.9rem;
}
.album-card {
  padding: 0.9rem 1rem;
  background: var(--foam);
  border: 1px solid var(--line);
}
.album-card__meta { color: var(--ink-soft); font-size: 0.88rem; }
.album-tools { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0; }
.album-chips, .album-form__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip, .album-add-btn, .cal-nav-btn, .cal-type {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font: inherit;
  cursor: pointer;
}
.chip.is-on, .cal-type[aria-pressed="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }

.cal-board__nav { display: flex; align-items: center; justify-content: space-between; }
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.35rem;
  margin-top: 0.8rem;
}
.cal-dow, .cal-day {
  min-height: 4.4rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  background: #fff;
  text-align: left;
  font: inherit;
}
.cal-dow { min-height: auto; background: transparent; border: 0; color: var(--ink-soft); font-size: 0.8rem; }
.cal-day { cursor: pointer; }
.cal-day.is-today { outline: 2px solid var(--accent); }
.cal-dot { display: block; font-size: 0.72rem; color: var(--accent); }

.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(20, 32, 43, 0.35);
  padding: 1rem;
}
.modal__panel {
  width: min(28rem, 100%);
  background: var(--foam);
  border-radius: 1rem;
  padding: 1rem 1.1rem 1.2rem;
}
.modal__bar { display: flex; justify-content: space-between; align-items: center; }
.album-form, .cal-form { display: grid; gap: 0.7rem; }
.album-form__check { display: flex; gap: 0.45rem; align-items: center; }
.album-form__check input { width: auto; margin: 0; }
.cal-types { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.calendar__layout { display: grid; gap: 1.5rem; }
@media (min-width: 880px) {
  .calendar__layout { grid-template-columns: 2fr 1fr; }
}