/* ---------------------------------------------------------------- tokens */
:root {
  --bg:        #f7f7f5;
  --surface:   #ffffff;
  --surface-2: #efefec;
  --text:      #16211f;
  --muted:     #6b7674;
  --border:    #e2e3df;
  --accent:    #0f766e;
  --accent-ink:#ffffff;
  --accent-soft:#d7efec;
  --l1:        #2f855a;
  --l2:        #b7791f;
  --l3:        #c53030;
  --shadow:    0 1px 2px rgba(16,33,31,.06), 0 6px 18px rgba(16,33,31,.06);
  --radius:    14px;
  --read-size: 18px;
  --read-lh:   1.72;

  /* Safe-area insets are deliberately NOT wrapped in custom properties. A
     custom property holding env() that then goes through calc() fails as
     "invalid at computed-value time" when it cannot resolve, which RESETS the
     property (bottom -> auto) instead of falling back. Used directly, with a
     literal declaration before it, an unsupported env() just drops that one
     declaration and the literal value survives. */
  --barh:      58px;   /* tab bar clearance */
  --barh-player: 150px;/* tab bar + player clearance */
}
html[data-theme="dark"] {
  --bg:        #101413;
  --surface:   #191f1e;
  --surface-2: #232b29;
  --text:      #e7ecea;
  --muted:     #93a09d;
  --border:    #2b3432;
  --accent:    #4fd1c5;
  --accent-ink:#06201d;
  --accent-soft:#12302c;
  --l1:        #68d391;
  --l2:        #f6c177;
  --l3:        #fc8181;
  --shadow:    0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
}
@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] {
    --bg:#101413; --surface:#191f1e; --surface-2:#232b29; --text:#e7ecea;
    --muted:#93a09d; --border:#2b3432; --accent:#4fd1c5; --accent-ink:#06201d;
    --accent-soft:#12302c; --l1:#68d391; --l2:#f6c177; --l3:#fc8181;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  overscroll-behavior-y: none;
  padding-bottom: 58px;
  padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px));
  -webkit-font-smoothing: antialiased;
}
body.has-player {
  padding-bottom: 150px;
  padding-bottom: calc(150px + env(safe-area-inset-bottom, 0px));
}
button { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
svg { width: 22px; height: 22px; fill: none; stroke: currentColor;
      stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------------------------------------------------------- top bar */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 6px;
  padding: 8px 10px;
  padding-top: calc(8px + env(safe-area-inset-top, 0px));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar h1 {
  flex: 1; margin: 0; font-size: 16px; font-weight: 650; letter-spacing: -.01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.icon-btn {
  background: none; border: 0; padding: 8px; border-radius: 10px;
  display: grid; place-items: center; color: var(--text); cursor: pointer;
}
.icon-btn:active { background: var(--surface-2); }

.view { min-height: 60vh; outline: none; }
.pad { padding: 14px; }

/* ---------------------------------------------------------------- filters */
.filters { position: sticky; top: 50px;
  top: calc(50px + env(safe-area-inset-top, 0px));
  z-index: 30; background: var(--bg); padding: 8px 0 6px; }
.chips { display: flex; gap: 8px; overflow-x: auto; padding: 0 14px 6px;
         scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto; border: 1px solid var(--border); background: var(--surface);
  color: var(--muted); border-radius: 999px; padding: 6px 13px; font-size: 13.5px;
  font-weight: 550; cursor: pointer; white-space: nowrap;
}
.chip[aria-pressed="true"] {
  background: var(--accent); border-color: var(--accent); color: var(--accent-ink);
}

/* ---------------------------------------------------------------- list */
.list { display: flex; flex-direction: column; }
.card {
  display: flex; gap: 12px; padding: 12px 14px; align-items: flex-start;
  border-bottom: 1px solid var(--border); background: transparent;
}
.card:active { background: var(--surface-2); }
.card .thumb {
  width: 92px; height: 62px; border-radius: 10px; object-fit: cover;
  background: var(--surface-2); flex: 0 0 auto;
}
.card .body { min-width: 0; flex: 1; }
.card .t { font-size: 15.5px; font-weight: 600; line-height: 1.35;
           display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
           overflow: hidden; }
.card .meta { display: flex; align-items: center; gap: 8px; margin-top: 6px;
              font-size: 12.5px; color: var(--muted); flex-wrap: wrap; }
.badge {
  font-size: 11px; font-weight: 700; letter-spacing: .02em;
  padding: 2px 6px; border-radius: 6px; border: 1px solid currentColor;
}
.badge.l1 { color: var(--l1); } .badge.l2 { color: var(--l2); } .badge.l3 { color: var(--l3); }
.badge.off { color: var(--muted); opacity: .7; }
.pill { background: var(--surface-2); border-radius: 6px; padding: 2px 7px; }

.sec-title { padding: 18px 14px 6px; font-size: 12.5px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

.empty { padding: 40px 20px; text-align: center; color: var(--muted); }
.spinner { display: grid; place-items: center; padding: 26px; }
.spinner i { width: 22px; height: 22px; border: 2.5px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------- reader */
.hero { width: 100%; height: 178px; object-fit: cover; background: var(--surface-2); display: block; }
.reader-head { padding: 14px 16px 4px; }
.reader-head h2 { margin: 0 0 8px; font-size: 22px; line-height: 1.25; letter-spacing: -.02em; }
.reader-head .meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  font-size: 12.5px; color: var(--muted); }

.seg-tabs { display: flex; gap: 6px; padding: 12px 14px 2px; }
.seg-tabs button {
  flex: 1; padding: 9px 6px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); font-size: 13.5px; font-weight: 600; cursor: pointer;
}
.seg-tabs button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent);
  background: var(--accent-soft); }
.tools { display: flex; gap: 8px; padding: 8px 14px 0; }
.tools button { border: 1px solid var(--border); background: var(--surface);
  border-radius: 9px; padding: 7px 11px; font-size: 13px; font-weight: 550; cursor: pointer; }
.tools button[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent);
  color: var(--accent); }

.article { padding: 6px 16px 40px; }
.article p { font-size: var(--read-size); line-height: var(--read-lh); margin: 0 0 1.05em; }
.article .s { border-radius: 4px; padding: .06em .1em; margin: -.06em -.1em; }
.article .s.on { background: var(--accent-soft); box-shadow: 0 0 0 2px var(--accent-soft); }
.article strong { font-weight: 700; }
.article .w {
  border-bottom: 2px solid var(--accent); cursor: pointer;
  background: none; border-radius: 0; padding: 0;
}
.article .w.mine { background: var(--accent-soft); }

.words { margin: 18px 16px 0; padding: 14px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); }
.words h3 { margin: 0 0 10px; font-size: 12.5px; letter-spacing: .07em;
  text-transform: uppercase; color: var(--muted); }
.words dt { font-weight: 650; margin-top: 9px; font-size: 14.5px; }
.words dd { margin: 2px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.words .add { font-size: 12px; margin-left: 8px; color: var(--accent);
  background: none; border: 0; cursor: pointer; font-weight: 600; }

/* side-by-side */
.cols { display: grid; gap: 14px; padding: 6px 14px 30px; }
.cols .col h4 { position: sticky; top: 50px;
  top: calc(50px + env(safe-area-inset-top, 0px));
  background: var(--bg);
  margin: 0; padding: 8px 0; font-size: 12.5px; letter-spacing: .07em;
  text-transform: uppercase; }
.cols .col h4.l1 { color: var(--l1); } .cols .col h4.l2 { color: var(--l2); }
.cols .col h4.l3 { color: var(--l3); }
.cols .col p { font-size: 16px; line-height: 1.65; margin: 0 0 .9em; }
@media (min-width: 900px) { .cols { grid-template-columns: repeat(3, 1fr); } }

/* ---------------------------------------------------------------- player */
/* One fixed bottom stack. The player and the tab bar are ordinary blocks inside
   it, so the player cannot be displaced by position maths going wrong; the only
   safe-area handling is a single padding-bottom, and if env() is unsupported
   that padding is simply 0 and both bars still sit flush against the bottom. */
.bottombar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-top: 1px solid var(--border);
}
.player {
  position: relative;
  background: var(--surface);
  box-shadow: 0 -6px 22px rgba(0,0,0,.07); padding: 8px 12px 10px;
}
.player[hidden] { display: none; }
html[data-theme="dark"] .player { box-shadow: 0 -6px 22px rgba(0,0,0,.4); }
.prow { display: flex; align-items: center; gap: 10px; }
.pbtn { background: none; border: 0; padding: 8px; border-radius: 10px;
  display: grid; place-items: center; cursor: pointer; }
.pbtn:active { background: var(--surface-2); }
.pbtn.primary { background: var(--accent); color: var(--accent-ink); border-radius: 50%;
  width: 42px; height: 42px; padding: 0; flex: 0 0 auto; }
.pbtn.primary svg { width: 20px; height: 20px; }
.pbtn[aria-pressed="true"] { color: var(--accent); background: var(--accent-soft); }
.ptime { font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums;
  min-width: 34px; text-align: center; }
.scrub { position: relative; flex: 1; height: 30px; display: flex; align-items: center;
  touch-action: none; cursor: pointer; }
.scrub .track { height: 4px; width: 100%; background: var(--surface-2); border-radius: 2px;
  position: relative; overflow: visible; }
.scrub .buf { position: absolute; inset: 0 auto 0 0; background: var(--border); border-radius: 2px; }
.scrub .now { position: absolute; inset: 0 auto 0 0; background: var(--accent); border-radius: 2px; }
.scrub .knob { position: absolute; top: 50%; width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); transform: translate(-50%,-50%); box-shadow: 0 1px 4px rgba(0,0,0,.3); }
.scrub .mrk { position: absolute; top: 50%; width: 2px; height: 16px; transform: translate(-50%,-50%);
  background: var(--l3); border-radius: 1px; }
.marks { position: absolute; left: 0; right: 0; top: 0; height: 6px; pointer-events: none; }
.marks i { position: absolute; width: 2px; height: 6px; background: var(--muted);
  opacity: .45; transform: translateX(-50%); }
.prow2 { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.pill-btn { border: 1px solid var(--border); background: var(--surface); border-radius: 999px;
  padding: 4px 10px; font-size: 12px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.pill-btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent);
  color: var(--accent-ink); }
.pill-btn.warn { border-color: var(--l3); color: var(--l3); }
.pnote { font-size: 11.5px; color: var(--muted); padding: 4px 2px 0; }
.pstatus { font-size: 12.5px; color: var(--muted); padding: 2px 0 0; }
.rate-wrap { display: flex; align-items: center; gap: 4px; }
.rate-wrap input { width: 84px; accent-color: var(--accent); }

/* ---------------------------------------------------------------- tabs */
.tabs {
  position: relative;
  display: flex;
  background: transparent;
}
.tabs a { flex: 1; text-align: center; padding: 11px 4px 10px; font-size: 12.5px;
  font-weight: 600; color: var(--muted); }
.tabs a[aria-current="page"] { color: var(--accent); }

/* ---------------------------------------------------------------- misc */
.sheet-back { position: fixed; inset: 0; background: rgba(0,0,0,.42); z-index: 70; }
.sheet { position: fixed; left: 0; right: 0; bottom: 0; z-index: 71;
  background: var(--surface); border-radius: 18px 18px 0 0;
  padding: 18px 18px 22px;
  padding-bottom: calc(22px + env(safe-area-inset-bottom, 0px));
  max-height: 72vh; overflow: auto; }
.sheet h3 { margin: 0 0 4px; font-size: 20px; }
.sheet .def { color: var(--muted); margin: 0 0 14px; }
.sheet .row { display: flex; gap: 8px; flex-wrap: wrap; }
.sheet .row button, .sheet .row a {
  border: 1px solid var(--border); background: var(--surface-2); border-radius: 10px;
  padding: 9px 13px; font-size: 13.5px; font-weight: 600; cursor: pointer; }
.sheet .row button.primary { background: var(--accent); border-color: var(--accent);
  color: var(--accent-ink); }
.toast { position: fixed; left: 50%; bottom: 120px;
  bottom: calc(120px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 9px 15px; border-radius: 999px;
  font-size: 13.5px; font-weight: 550; z-index: 90; max-width: 84vw; text-align: center; }

.src { padding: 22px 16px 60px; color: var(--muted); font-size: 12.5px; }
.src a { color: var(--accent); }