:root {
  --bg: #10141a;
  --bg-elev: #171d26;
  --bg-elev2: #1f2732;
  --text: #dce4ee;
  --muted: #93a2b5;
  --faint: #64748b;
  --cool: #78b0c8;
  --warm: #e0aa6e;
  --accent: #8fb8cc;
  --line: #263140;
  --danger: #d98a8a;
  --radius: 16px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--sans); line-height: 1.55;
  padding: max(env(safe-area-inset-top), 0px) 0 96px;
  -webkit-font-smoothing: antialiased;
}
.hero { text-align: center; padding: 44px 24px 16px; max-width: 660px; margin: 0 auto; }
.mark {
  width: 68px; height: 68px; margin: 0 auto 16px; border-radius: 50%;
  background: linear-gradient(180deg, var(--cool), var(--warm));
  border: 1px solid var(--line); opacity: .92;
}
.hero h1 { font-family: var(--serif); font-weight: 500; font-size: 2rem; margin: 0; }
.tagline { color: var(--accent); margin: 6px 0 0; }
.goal { color: var(--muted); margin: 10px 0 0; font-size: .92rem; }

.progress { margin: 22px auto 0; max-width: 320px; }
.progress-bar { height: 6px; background: var(--bg-elev2); border-radius: 99px; overflow: hidden; }
.progress-bar span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--cool), var(--warm)); transition: width .4s; }
.progress-label { color: var(--faint); font-size: .8rem; margin-top: 8px; }

.offline { margin: 14px auto 0; display: flex; gap: 10px; justify-content: center; align-items: center; flex-wrap: wrap; }
.offline[hidden] { display: none; }
.offline-btn { background: var(--bg-elev2); color: var(--accent); border: 1px solid var(--line); border-radius: 99px; padding: 8px 16px; font-size: .82rem; cursor: pointer; }
.offline-btn:disabled { opacity: .85; cursor: default; }
.offline-btn.wide { width: 100%; margin-top: 14px; padding: 12px; }
.offline-status { color: var(--faint); font-size: .76rem; }

.update-bar { position: fixed; top: 0; left: 0; right: 0; z-index: 70; display: flex; align-items: center; justify-content: center; gap: 12px; padding: calc(9px + env(safe-area-inset-top)) 14px 9px; background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; font-size: .84rem; box-shadow: 0 2px 12px rgba(0,0,0,.35); }
.update-bar[hidden] { display: none; }
.update-bar button { border: none; background: rgba(16,20,26,.88); color: #eaf1f8; border-radius: 99px; padding: 6px 15px; font-size: .82rem; font-weight: 600; cursor: pointer; }

.toolbar { max-width: 660px; margin: 6px auto 0; padding: 0 16px; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tool { background: rgba(143,184,204,.07); border: 1px solid rgba(143,184,204,.30); color: var(--accent); border-radius: 99px; padding: 7px 14px; font-size: .8rem; cursor: pointer; white-space: nowrap; }
.tool:hover { background: rgba(143,184,204,.16); }

.ladder { max-width: 660px; margin: 12px auto 0; padding: 12px 16px 40px; }
.loading { color: var(--muted); text-align: center; }

.section { display: flex; align-items: center; gap: 14px; margin: 32px 6px 6px; color: var(--accent); font-family: var(--serif); font-size: .74rem; letter-spacing: .2em; text-transform: uppercase; }
.section:first-child { margin-top: 6px; }
.section::before, .section::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--line) 30%, var(--line) 70%, transparent); }

.card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 16px 8px; margin: 14px 0; }
.card.orientation { background: linear-gradient(var(--bg-elev), var(--bg)); }
.card.done-all .seq { background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; border-color: transparent; }
.card-head { display: flex; gap: 14px; align-items: center; cursor: pointer; }
.card-head .card-title { align-self: flex-start; }
.chev { flex: 0 0 auto; color: var(--faint); font-size: .9rem; margin-left: auto; align-self: center; }
.card.collapsed { padding-bottom: 16px; }
.card.collapsed .card-body { display: none; }
.card.collapsed .card-head h2 { margin-bottom: 2px; }
.card-body { margin-top: 4px; }
.card-btn { width: 100%; margin-top: 8px; padding: 10px; border-radius: 10px; border: 1px solid rgba(143,184,204,.34); background: rgba(143,184,204,.08); color: var(--accent); font-size: .84rem; cursor: pointer; }
.card-btn:hover { background: rgba(143,184,204,.16); }
.seq { flex: 0 0 auto; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--bg-elev2); color: var(--accent); font-family: var(--serif); font-size: .9rem; border: 1px solid var(--line); }
.card-title { flex: 1 1 auto; min-width: 0; }
.card-title h2 { font-family: var(--serif); font-weight: 500; font-size: 1.12rem; margin: 2px 0 4px; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }
.badge { font-size: .68rem; text-transform: uppercase; letter-spacing: .05em; padding: 2px 8px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.badge.ex { color: var(--warm); border-color: #4a3a27; }
.badge.week { color: var(--cool); border-color: #274050; }

.formula { margin: 8px 0 2px; font-family: var(--serif); font-style: italic; font-size: 1.02rem; color: var(--text); }
.formula::before { content: "“"; } .formula::after { content: "”"; }
.expands { color: var(--faint); font-size: .8rem; margin: 2px 0 0; }

.caution { margin: 10px 0 2px; padding: 10px 12px; background: rgba(217,138,138,.09); border: 1px solid rgba(217,138,138,.3); border-radius: 10px; color: #e9b6b6; font-size: .82rem; }
.caution b { color: var(--danger); }
.prereq { margin: 10px 0 2px; padding: 10px 12px; background: var(--bg-elev2); border-radius: 10px; border: 1px solid var(--line); }
.prereq-label, .crit-label { display: block; font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
.prereq ul { margin: 0; padding-left: 1.1em; }
.prereq li { color: var(--muted); font-size: .84rem; margin: 3px 0; }

.parts { list-style: none; margin: 12px 0 4px; padding: 0; }
.part { display: flex; align-items: center; gap: 10px; padding: 10px 4px; border-top: 1px solid var(--line); }
.part:first-child { border-top: none; }
.part-main { flex: 1 1 auto; min-width: 0; }
.part-label { font-size: .92rem; }
.part-meta { color: var(--faint); font-size: .78rem; }
.part.planned .part-label { color: var(--faint); }
.play { flex: 0 0 auto; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: var(--bg-elev2); color: var(--accent); font-size: 1rem; cursor: pointer; display: grid; place-items: center; }
.play.playing { background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; border-color: transparent; }
span.play { cursor: default; opacity: .4; }
.part.planned .play { opacity: .28; border-style: dashed; }
.soon { color: var(--faint); font-size: .78rem; padding-right: 6px; }
.row-tag { font-size: .62rem; text-transform: uppercase; letter-spacing: .06em; color: var(--danger); border: 1px solid rgba(217,138,138,.4); border-radius: 99px; padding: 1px 6px; margin-left: 6px; vertical-align: middle; }

.practice { margin: 12px 0 6px; padding: 12px; background: var(--bg-elev2); border-radius: 10px; border: 1px solid var(--line); }
.hand-row { display: flex; align-items: center; gap: 8px; margin: 4px 0 2px; }
.hand-label { flex: 1 1 auto; font-size: .8rem; color: var(--muted); }
.hand { padding: 6px 14px; border-radius: 8px; border: 1px solid rgba(143,184,204,.26); background: var(--bg); color: var(--muted); font-size: .8rem; cursor: pointer; }
.hand.on { border-color: transparent; color: #10141a; background: linear-gradient(180deg, var(--cool), var(--warm)); font-weight: 600; }
.stages-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.stage { font-size: .78rem; padding: 6px 10px; border-radius: 8px; border: 1px solid rgba(143,184,204,.26); background: var(--bg); color: var(--muted); cursor: pointer; }
.stage.on { border-color: var(--accent); color: var(--text); background: var(--bg-elev); }
.practice-hint { color: var(--faint); font-size: .78rem; margin: 6px 0 10px; }
.start-btn { width: 100%; padding: 11px; border-radius: 10px; border: none; background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; font-size: .9rem; font-weight: 600; cursor: pointer; }
.start-btn:active { transform: scale(.99); }
.sleep-btn { width: 100%; margin-top: 8px; padding: 11px; border-radius: 10px; border: 1px solid rgba(143,184,204,.34); background: rgba(143,184,204,.06); color: var(--text); font-size: .85rem; cursor: pointer; }
.sleep-btn:hover { background: rgba(143,184,204,.15); }
.sleep-note { color: var(--faint); font-size: .74rem; margin: 6px 2px 2px; }
.silent { margin: 12px 0 6px; padding: 12px; background: var(--bg-elev2); border-radius: 10px; border: 1px solid var(--line); }
.silent-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.silent-min { padding: 8px 13px; border-radius: 8px; border: 1px solid rgba(143,184,204,.26); background: var(--bg); color: var(--muted); font-size: .82rem; cursor: pointer; }
.silent-min:hover { background: var(--bg-elev); color: var(--text); }
.silent-min.on { border-color: var(--accent); color: var(--text); background: var(--bg-elev); }

.crit { margin: 12px 0 6px; padding: 12px; background: var(--bg-elev2); border-radius: 10px; border: 1px solid var(--line); }
.crit ul { list-style: none; margin: 0; padding: 0; }
.crit li { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; font-size: .85rem; color: var(--muted); }
.crit .box { flex: 0 0 auto; width: 24px; height: 24px; border-radius: 6px; border: 2px solid var(--accent); background: var(--bg); cursor: pointer; color: transparent; font-size: .8rem; font-weight: 700; display: grid; place-items: center; margin-top: 1px; transition: background .12s, transform .1s; }
.crit .box:hover { background: var(--bg-elev); }
.crit .box:active { transform: scale(.9); }
.crit .box.on { background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; border-color: transparent; }
.crit li { cursor: pointer; }
.ready-btn { margin-top: 8px; width: 100%; padding: 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg-elev); color: var(--faint); font-size: .85rem; cursor: pointer; }
.ready-btn.armed { color: var(--text); border-color: var(--accent); }
.ready-btn.done { background: linear-gradient(180deg, rgba(120,176,200,.25), rgba(224,170,110,.25)); color: var(--text); border-color: transparent; }

/* padlock progress status (on the card) + progress hub (in the modal) */
.lockstat { display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; margin: 12px 0 4px; padding: 12px; background: var(--bg-elev2); border: 1px solid var(--line); border-radius: 12px; cursor: pointer; }
.lockstat:hover { background: var(--bg-elev); }
.lockstat.ready { border-color: var(--accent); }
.lockstat.ahead { opacity: .8; }
.lock-ring { position: relative; flex: 0 0 auto; width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--accent) calc(var(--p,0)*1%), var(--line) 0); }
.lockstat.mastered .lock-ring, .lockstat.ready .lock-ring { background: linear-gradient(180deg, var(--cool), var(--warm)); }
.lockstat.ahead .lock-ring { background: var(--line); }
.lock-glyph { width: 38px; height: 38px; border-radius: 50%; background: var(--bg-elev2); display: grid; place-items: center; font-size: 1.05rem; }
.lockstat:hover .lock-glyph { background: var(--bg-elev); }
.lockstat.mastered .lock-glyph, .lockstat.ready .lock-glyph { color: var(--text); }
.lock-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.lock-title { font-size: .92rem; color: var(--text); }
.lockstat.ahead .lock-title { color: var(--muted); }
.lock-sub { font-size: .76rem; color: var(--faint); line-height: 1.4; }
.crit-guide { list-style: disc; margin: 0 0 4px; padding-left: 1.2em; }
.crit-guide li { color: var(--muted); font-size: .84rem; margin: 5px 0; line-height: 1.45; }
.hub-sec { margin: 0 0 16px; }
.hub-ev { color: var(--faint); font-size: .82rem; margin: 8px 0 10px; line-height: 1.5; }
.hub-ev strong { color: var(--accent); }

/* practice log */
.log-btn { margin-top: 8px; }
.log-ev { margin: 10px 0 2px; font-size: .78rem; color: var(--faint); line-height: 1.5; }
.log-ev strong { color: var(--accent); font-weight: 600; }
.log-view { background: none; border: none; color: var(--accent); font-size: .78rem; cursor: pointer; padding: 0; text-decoration: underline; }
.log-for { font-family: var(--serif); font-style: italic; color: var(--text); font-size: 1.02rem; margin: 0 0 14px !important; }
.log-q { font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.log-opts { display: flex; gap: 8px; margin-bottom: 14px; }
.log-opt { flex: 1 1 0; padding: 12px 6px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--muted); font-size: .84rem; cursor: pointer; }
.log-opt:hover { background: var(--bg-elev2); }
.log-opt.on { border-color: transparent; color: #10141a; background: linear-gradient(180deg, var(--cool), var(--warm)); font-weight: 600; }
.log-note { width: 100%; resize: vertical; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-family: var(--sans); font-size: .88rem; line-height: 1.5; }
.log-note:focus { outline: none; border-color: var(--accent); }
.log-actions { display: flex; gap: 10px; margin-top: 14px; }
.log-skip { flex: 0 0 auto; padding: 11px 18px; border-radius: 10px; border: 1px solid var(--line); background: transparent; color: var(--muted); font-size: .88rem; cursor: pointer; }
.log-save { flex: 1 1 auto; padding: 11px; border-radius: 10px; border: none; background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; font-size: .9rem; font-weight: 600; cursor: pointer; }
.log-save:disabled { opacity: .4; cursor: default; }
.log-priv { color: var(--faint) !important; font-size: .74rem !important; margin: 14px 0 0 !important; }
.log-list { list-style: none; margin: 4px 0 0; padding: 0; }
.log-item { padding: 10px 0; border-top: 1px solid var(--line); }
.log-item:first-child { border-top: none; }
.log-item-h { display: flex; align-items: center; gap: 8px; }
.log-badge { font-size: .68rem; padding: 2px 9px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.log-badge.yes { color: #10141a; background: linear-gradient(180deg, var(--cool), var(--warm)); border-color: transparent; }
.log-badge.partly { color: var(--warm); border-color: #4a3a27; }
.log-badge.no { color: var(--faint); }
.log-ex { font-size: .8rem; color: var(--muted); }
.log-when { margin-left: auto; color: var(--faint); font-size: .76rem; }
.log-del { flex: 0 0 auto; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--line); background: var(--bg-elev2); color: var(--faint); font-size: .72rem; cursor: pointer; }
.log-del:hover { color: var(--danger); border-color: rgba(217,138,138,.4); }
.log-item-note { color: var(--muted); font-size: .84rem; margin-top: 6px; padding-left: 2px; }

.foot { max-width: 660px; margin: 0 auto; padding: 24px 24px 48px; text-align: center; color: var(--muted); font-size: .84rem; }
.foot .muted { color: var(--faint); font-size: .76rem; }
a { color: var(--accent); }

/* modal / sheets */
.modal { position: fixed; inset: 0; z-index: 60; display: flex; align-items: center; justify-content: center; padding: 20px; background: rgba(6,9,13,.72); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.modal[hidden] { display: none; }
.sheet { position: relative; width: 100%; max-width: 440px; max-height: 84vh; overflow-y: auto; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px 26px; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.sheet-close { position: absolute; top: 12px; right: 12px; width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--line); background: var(--bg-elev2); color: var(--muted); cursor: pointer; }
.sheet h3 { font-family: var(--serif); font-weight: 500; font-size: 1.25rem; color: var(--accent); margin: 0 0 12px; padding-right: 28px; }
.sheet p { color: var(--muted); margin: 0 0 12px; font-size: .9rem; }
.sheet ul { margin: 0 0 12px; padding-left: 1.2em; } .sheet li { color: var(--muted); margin: 6px 0; font-size: .88rem; }
.sheet ol { margin: 0 0 12px; padding-left: 1.3em; } .sheet ol li { color: var(--text); }
.sheet strong { color: var(--text); }
.ack { display: flex; gap: 10px; align-items: flex-start; color: var(--text); font-size: .88rem; margin: 8px 0 4px; }
.ack input { margin-top: 3px; }

/* mini player */
.mini { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; display: flex; align-items: center; gap: 12px; padding: 10px 14px calc(10px + env(safe-area-inset-bottom)); background: rgba(23,29,38,.97); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); border-top: 1px solid var(--line); }
.mini[hidden] { display: none; }
.mini-play, .mini-btn { flex: 0 0 auto; border-radius: 50%; cursor: pointer; display: grid; place-items: center; }
.mini-play { width: 46px; height: 46px; font-size: 1.05rem; background: linear-gradient(180deg, var(--cool), var(--warm)); color: #10141a; border: none; }
.mini-btn { width: 42px; height: 42px; font-size: 1.25rem; background: var(--bg-elev2); color: var(--accent); border: 1px solid var(--line); }
.mini-body { flex: 1 1 auto; min-width: 0; }
.mini-title { font-size: .82rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 5px; }
.mini-seek { width: 100%; height: 4px; accent-color: var(--accent); }
.mini-times { display: flex; justify-content: space-between; color: var(--faint); font-size: .7rem; margin-top: 3px; }
.mini.session .mini-seek { pointer-events: auto; cursor: pointer; }
.mini.session .mini-title { font-size: .92rem; margin-bottom: 4px; color: var(--text); }
.mini.session .mini-times { margin-top: 4px; color: var(--muted); font-size: .72rem; }