:root {
  --bg: #F6F4EF; --paper: #FFFFFF; --ink: #1F2328; --muted: #646B75; --line: #E4E0D6;
  --accent: #2F5BD3; --accent-ink: #FFFFFF; --chip: #ECE8DF; --mark: #FFE58A; --new: #E2552D;
  --shadow: 0 1px 3px rgba(31, 35, 40, .08); --hl: #B23A12; --hl-bg: #FDE3D6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16181C; --paper: #1F2227; --ink: #E7E9EC; --muted: #9AA1AB; --line: #2E333A;
    --accent: #7FA2FF; --accent-ink: #10131A; --chip: #2A2E35; --mark: #6B5A12; --new: #FF7A52;
    --shadow: none; --hl: #FFB08F; --hl-bg: #4A2618;
  }
}
:root[data-theme="dark"] {
  --bg: #16181C; --paper: #1F2227; --ink: #E7E9EC; --muted: #9AA1AB; --line: #2E333A;
  --accent: #7FA2FF; --accent-ink: #10131A; --chip: #2A2E35; --mark: #6B5A12; --new: #FF7A52;
  --shadow: none; --hl: #FFB08F; --hl-bg: #4A2618;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
button, input { font: inherit; color: inherit; }
[hidden] { display: none !important; }

/* ---------- top bar ---------- */
.bar { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.bar-in { max-width: 780px; margin: 0 auto; padding: 12px 16px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.title { font-weight: 700; font-size: 18px; margin: 0 auto 0 0; }
.chips { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; width: 100%; order: 3; }
.chips::-webkit-scrollbar { display: none; }
.chip { border: 0; border-radius: 999px; padding: 6px 14px; background: var(--chip); cursor: pointer;
  white-space: nowrap; font-size: 15px; }
.chip.on { background: var(--accent); color: var(--accent-ink); }
.search { display: flex; align-items: center; gap: 8px; height: 38px; padding: 0 12px; border-radius: 19px;
  background: var(--paper); border: 1px solid var(--line); color: var(--muted); width: min(260px, 100%); }
.search input { border: 0; outline: 0; background: transparent; flex: 1; min-width: 0; color: var(--ink); font-size: 15px; }
.icon-btn { border: 0; background: transparent; color: var(--muted); cursor: pointer; padding: 6px; border-radius: 8px; font-size: 14px; }
.icon-btn:hover { color: var(--ink); background: var(--chip); }

/* ---------- feed ---------- */
main { max-width: 780px; margin: 0 auto; padding: 8px 16px 80px; }
.day { margin-top: 28px; }
.day-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin: 0 0 12px; }
.day-head h2 { margin: 0; font-size: 22px; line-height: 1.2; }
.day-head .period { color: var(--muted); font-size: 14px; }
.badge { background: var(--new); color: #fff; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 999px; }
.group { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px;
  margin-bottom: 12px; box-shadow: var(--shadow); }
.group h3 { margin: 0 0 6px; font-size: 16px; color: var(--accent); }
.group-period { color: var(--muted); font-size: 13px; margin: -4px 0 4px; }
.group ul { margin: 0; padding-left: 20px; }
.group li { margin: 8px 0; }
.group li::marker { color: var(--muted); }
.group ul ul { padding-left: 18px; }
.group ul ul li { margin: 4px 0; }
.group p { margin: 8px 0; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 1px; }
.hl { font-weight: 700; color: var(--hl); background: var(--hl-bg); border-radius: 4px; padding: 0 3px; }
.home { color: var(--muted); text-decoration: none; }
.home:hover { color: var(--accent); }

/* ---------- hub ---------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-top: 28px; }
.tile { display: flex; flex-direction: column; gap: 4px; padding: 20px; background: var(--paper); border: 1px solid var(--line);
  border-radius: 16px; box-shadow: var(--shadow); color: inherit; text-decoration: none; transition: border-color .15s, transform .15s; }
.tile:hover { border-color: var(--accent); transform: translateY(-2px); }
.tile-icon { font-size: 28px; }
.tile-name { font-weight: 700; font-size: 19px; }
.tile-desc { color: var(--muted); font-size: 15px; }
.empty { color: var(--muted); text-align: center; margin-top: 60px; }

@media (min-width: 700px) {
  .chips { width: auto; order: 0; flex: 1; }
  .title { margin-right: 6px; }
}