:root {
  --paper: #f3efe3; --card: #fffdf6; --ink: #1f2b28; --muted: #55635f; --line: #d9d2bf; --accent: #1d6466; --accent-ink: #ffffff; --field: #fbf8ef; --bg: #fbf8ef;
  --reed: #56742a; --wait: #8a5a00; --snag: #b0352a; --warn: #a3302a; --warn-bg: #f7e3df; --info-bg: #e2eeec; --ok-bg: #e6eedb; --ok-ink: #3f5c1c;
  --l-you: #b8a77e; --l-front: #3c8449; --l-back: #4f9ea0; --l-base: #8e8578;
  --v-below: #1d5a6e; --v-view: #b0352a; --v-paddle: #8a5a00; --v-glide: #3f6e22; --v-ink: #ffffff;
  --shadow: 0 1px 0 rgba(40, 50, 30, 0.05), 0 6px 18px rgba(40, 50, 30, 0.07);
}
html[data-theme="dark"] {
  --paper: #10181b; --card: #172226; --ink: #e5eeea; --muted: #a6b8b2; --line: #2d3d40; --accent: #7fd0cd; --accent-ink: #0e1a1c; --field: #132024; --bg: #132024;
  --reed: #a9cf76; --wait: #ffcf66; --snag: #ff8a7a; --warn: #ff9d8f; --warn-bg: #3a2422; --info-bg: #1b3034; --ok-bg: #1f2e1b; --ok-ink: #b5dd8a;
  --l-you: #c9bea6; --l-front: #6cc07a; --l-back: #6fc2c4; --l-base: #a59b8c;
  --v-below: #7fc4d8; --v-view: #ff8a7a; --v-paddle: #ffcf66; --v-glide: #a9cf76; --v-ink: #0f191b;
  --shadow: none;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--paper); color: var(--ink); font: 16px/1.55 "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif; }
a { color: var(--accent); }
h1, h2, h3, .brand strong { font-family: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif; }
code { font-size: 0.88em; background: var(--info-bg); padding: 1px 4px; border-radius: 3px; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.small { font-size: 0.88rem; } .muted { color: var(--muted); }

.top, .bar { display: flex; align-items: center; gap: 12px; padding: 10px 18px; border-bottom: 2px solid var(--accent); background: var(--card); position: sticky; top: 0; z-index: 5; flex-wrap: wrap; }
.back { text-decoration: none; color: var(--muted); font-size: 0.9rem; }
.brand { display: flex; align-items: center; gap: 8px; font-size: 1.15rem; }
.logo { width: 26px; height: 26px; }
.lg-w { fill: #7fb8b5; } .lg-s { fill: #ffffff; stroke: #2a3b37; stroke-width: 0.9; } .lg-f { stroke: #2a3b37; stroke-width: 1.2; fill: none; stroke-linecap: round; }
.session { margin-left: auto; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.chip-s { font-size: 0.85rem; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; }

.btn, .pill { font: inherit; font-size: 0.9rem; border: 1.5px solid var(--accent); color: var(--accent); background: transparent; border-radius: 6px; padding: 6px 13px; cursor: pointer; text-decoration: none; display: inline-block; line-height: 1.3; }
.btn:hover:not(:disabled), .pill:hover { background: var(--info-bg); }
.btn.solid, .pill.solid { background: var(--accent); color: var(--accent-ink); }
.btn.solid:hover:not(:disabled) { filter: brightness(1.1); background: var(--accent); color: var(--accent-ink); }
.btn.big { font-size: 1.05rem; padding: 10px 20px; }
.btn.tiny { font-size: 0.8rem; padding: 4px 10px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

main { max-width: 1240px; margin: 0 auto; padding: 18px 16px 30px; }
.hero { padding: 14px 0 4px; max-width: 860px; }
.eyebrow { margin: 0; text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; color: var(--reed); font-weight: 700; }
h1 { font-size: 2.6rem; margin: 4px 0 8px; line-height: 1.08; }
h1 .sub { display: block; font-size: 1.12rem; font-weight: 400; font-style: italic; color: var(--muted); margin-top: 6px; }
.samples { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 10px 0 4px; }
.sample { font: inherit; font-size: 0.86rem; border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 6px; padding: 5px 12px; cursor: pointer; }
.sample:hover { border-color: var(--accent); }
.sample.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.bench { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 18px; align-items: start; }
.bench .card { margin: 14px 0; }
.pond-card { position: sticky; top: 64px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 18px 20px; margin: 18px 0; box-shadow: var(--shadow); }
.ch { margin: 0 0 10px; font-size: 1.3rem; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.no { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font-size: 0.92rem; font-family: "Avenir Next", Helvetica, Arial, sans-serif; }
.free, .paid { font-family: "Avenir Next", Helvetica, Arial, sans-serif; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; border-radius: 4px; padding: 2px 8px; }
.free { background: var(--ok-bg); color: var(--ok-ink); } .paid { background: var(--warn-bg); color: var(--warn); }
.fld { margin: 6px 0; }
.lab { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 3px; }
.inp { width: 100%; font: inherit; color: var(--ink); background: var(--field); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; }
.inp:focus, .tick input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 10px 0 4px; }
.note { background: var(--info-bg); border-left: 3px solid var(--accent); padding: 8px 10px; border-radius: 4px; font-size: 0.9rem; }

.rows { list-style: none; padding: 0; margin: 8px 0; }
.row { display: grid; grid-template-columns: 1.6em minmax(0, 1fr) 9.4em 4.4em 3.4em; gap: 6px 8px; align-items: end; border: 1px solid var(--line); border-left: 6px solid var(--l-you); border-radius: 6px; padding: 8px 10px; margin: 8px 0; background: var(--field); }
.row.lane-front { border-left-color: var(--l-front); } .row.lane-back { border-left-color: var(--l-back); } .row.lane-base { border-left-color: var(--l-base); }
.row.lane-back, .row.lane-base { background: linear-gradient(90deg, var(--info-bg), var(--field) 60%); }
.rowno { font-family: Charter, Georgia, serif; font-weight: 700; align-self: center; }
.rowmins { display: flex; flex-direction: column; }
.rowmins .lab { font-weight: 500; font-size: 0.72rem; color: var(--muted); margin: 0; }
.marks { grid-column: 2 / -1; grid-row: 2; display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.84rem; }
.tick { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; color: var(--ink); }
.tick input { width: 16px; height: 16px; margin: 0; }
.tick.t-wait input { accent-color: var(--wait); } .tick.t-snag input { accent-color: var(--snag); } .tick.t-guess input { accent-color: var(--accent); }
.tick.off { color: var(--muted); opacity: 0.55; cursor: not-allowed; }
.rowtools { display: flex; justify-content: flex-end; align-self: end; grid-column: 5; grid-row: 1; }
.x { font: inherit; border: none; background: transparent; color: var(--muted); cursor: pointer; font-size: 1.15rem; line-height: 1; padding: 4px 6px; }
.x:hover:not(:disabled) { color: var(--warn); } .x:disabled { opacity: 0.3; cursor: default; }

.drawing { width: 100%; border-radius: 6px; overflow: hidden; border: 1px solid var(--line); }
.drawing svg { width: 100%; height: auto; display: block; }
.legend { display: flex; gap: 6px 14px; flex-wrap: wrap; align-items: center; margin: 8px 0 4px; }
.lg { display: inline-block; width: 14px; height: 14px; border-radius: 50%; vertical-align: -2px; margin-right: 3px; }
.lg-wait { border: 2px dotted var(--wait); } .lg-snag { background: var(--snag); } .lg-guess { border: 2px dashed var(--accent); } .lg-rip { border: 2px solid var(--l-back); border-radius: 50% / 30%; width: 20px; height: 9px; }
.numbers { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 10px 0 6px; }
.num { border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px; background: var(--field); }
.num b { display: block; font-family: Charter, Georgia, serif; font-size: 1.4rem; line-height: 1.1; }
.num span { font-size: 0.76rem; color: var(--muted); }
.vline { grid-column: 1 / -1; font-size: 0.92rem; margin: 2px 0; }
.vtag { display: inline-block; font-size: 0.78rem; font-weight: 700; border-radius: 4px; padding: 2px 9px; color: var(--v-ink); white-space: nowrap; letter-spacing: 0.02em; }
.v-snag-below { background: var(--v-below); } .v-snag-in-view { background: var(--v-view); } .v-long-paddle { background: var(--v-paddle); } .v-smooth-glide { background: var(--v-glide); }

.progress { border: 1px dashed var(--accent); border-radius: 6px; padding: 10px 12px; margin: 10px 0; }
.steps { list-style: none; padding: 0; margin: 6px 0; }
.step { color: var(--muted); } .step.done { color: var(--ok-ink); } .step.active { color: var(--ink); font-weight: 600; }
.step-ic { display: inline-block; width: 1em; font-family: monospace; }
.raw { white-space: pre-wrap; background: var(--paper); padding: 10px; border-radius: 6px; font-size: 0.82rem; max-height: 320px; overflow: auto; }

.result { margin-top: 12px; border-top: 2px solid var(--accent); padding-top: 10px; }
.result.empty .rnotes, .result.empty #rReconH, .result.empty .recon { display: none; }
.rhead { display: flex; justify-content: space-between; gap: 10px; align-items: center; flex-wrap: wrap; }
.badge { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; border: 1px solid var(--line); border-radius: 4px; padding: 2px 10px; color: var(--muted); }
.badge.on { border-color: transparent; color: var(--v-ink); }
.headline { font-family: Charter, Georgia, serif; font-size: 1.2rem; margin: 10px 0; }
.rnotes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 0; }
.rnote { border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; background: var(--field); }
.rnote.n-fix_for_them, .rnote.n-ask_next_time { border-left: 4px solid var(--accent); }
.rnote dt { font-weight: 700; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.rnote dd { margin: 3px 0 0; }
.rnote .copy1 { margin-top: 6px; }
.recon { padding-left: 18px; font-size: 0.9rem; }
.recon li.bad { color: var(--warn); font-weight: 600; } .recon li.warn { color: var(--warn); } .recon li.none { color: var(--muted); list-style: none; margin-left: -18px; }
.saved { list-style: none; padding: 0; margin: 8px 0; }
.hrow { display: flex; gap: 10px; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); padding: 8px 0; }
.hrow.none { color: var(--muted); font-style: italic; }
.hinfo { display: flex; flex-direction: column; min-width: 0; } .hinfo b { overflow-wrap: anywhere; }
.hbtns { display: flex; gap: 6px; flex-shrink: 0; }
.about p { max-width: 860px; }
.foot { max-width: 1240px; margin: 0 auto; padding: 8px 16px 40px; font-size: 0.85rem; color: var(--muted); }
.toasts { position: fixed; right: 14px; bottom: 14px; display: flex; flex-direction: column; gap: 8px; z-index: 20; max-width: min(380px, calc(100vw - 28px)); }
.toast { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 6px; padding: 8px 12px; font-size: 0.9rem; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15); transition: opacity 0.5s; }
.toast.err { border-left-color: var(--warn); } .toast.gone { opacity: 0; }

@media (max-width: 1000px) {
  .bench { grid-template-columns: 1fr; gap: 0; }
  .pond-card { position: static; }
  .rnotes { grid-template-columns: 1fr; }
  h1 { font-size: 2.1rem; }
}
@media (max-width: 600px) {
  .grid2 { grid-template-columns: 1fr; gap: 0; }
  .row { grid-template-columns: 1.4em minmax(0, 1fr) 4.4em; }
  .row > .what { grid-column: 2 / 4; grid-row: 1; }
  .row > .lane-sel { grid-column: 2; grid-row: 2; }
  .row > .rowmins { grid-column: 3; grid-row: 2; }
  .row > .marks { grid-column: 2 / 4; grid-row: 3; gap: 6px 12px; }
  .row > .rowtools { grid-column: 1; grid-row: 2 / 4; flex-direction: column; justify-content: flex-start; align-self: start; }
  .rowno { align-self: start; padding-top: 6px; }
  .numbers { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
  .num b { font-size: 1.2rem; }
}
@media (max-width: 420px) {
  .top { padding: 8px 12px; gap: 8px; }
  .back-t { display: none; }
  .brand { font-size: 1rem; }
  .btn { padding: 5px 10px; }
  .card { padding: 14px 12px; }
  h1 { font-size: 1.85rem; }
}
@media print {
  .top, .samples, .actions, .exports, #runBtn, .toasts, .foot, .hero .lede, .rowtools { display: none !important; }
  .card { box-shadow: none; break-inside: avoid; }
  .bench { grid-template-columns: 1fr; } .pond-card { position: static; }
}