/* AMC 8 Practice - main stylesheet.
   Translated from amc8/lib/render.py's inline CSS (warm cream / serif / green-accent look).
   Phase A1 baseline; revisit in A3 against math.ahaanamg.com. */

:root {
  --paper:#fbf8f1; --ink:#222a2f; --soft:#5f6b72; --faint:#8a949a;
  --rule:#e6dfd0; --line:#efe9dc;
  --accent:#2f6f5e; --accent-d:#235244; --accent-bg:#e9f1ed;
  --step:#b5651d; --gold:#c8922b;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --sans:ui-rounded,"Avenir Next",Avenir,"Segoe UI",system-ui,sans-serif;
}

* { box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
body {
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--serif); line-height:1.6; font-size:18px;
}
a { color:var(--accent-d); text-decoration:none; }
a:hover { text-decoration:underline; }
.muted { color:var(--soft); }

.wrap { max-width:720px; margin:0 auto; padding:0 20px; }

.crumb {
  font-family:var(--sans); font-size:13px; color:var(--soft);
  padding:14px 20px; border-bottom:1px solid var(--line);
  position:sticky; top:0; z-index:10;
  background:rgba(251,248,241,.94); backdrop-filter:blur(6px);
}
.crumb a { color:var(--accent-d); }
.crumb .sep { color:var(--faint); margin:0 7px; }

header.hero { padding:40px 0 6px; text-align:center; }
.eyebrow {
  font-family:var(--sans); font-weight:700; font-size:12.5px;
  letter-spacing:2px; text-transform:uppercase; color:var(--accent);
}
h1 { font-size:34px; font-weight:600; margin:10px 0; letter-spacing:-.4px; line-height:1.15; }
.lede { color:var(--soft); font-style:italic; margin:0 auto; max-width:540px; }
.meta-row { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin:18px 0 4px; font-family:var(--sans); font-size:13px; }
.pill {
  background:var(--accent-bg); border:1px solid #cfe3da; color:var(--accent-d);
  padding:6px 13px; border-radius:999px; font-weight:600;
}
.count-pill {
  font-family:var(--sans); font-size:12px; color:var(--faint);
  background:#fff; border:1px solid var(--rule); padding:2px 8px; border-radius:999px;
  margin-left:8px;
}

.set { margin:40px 0 0; padding-top:16px; border-top:2px solid var(--ink); }
.set-title { font-size:26px; font-weight:600; margin:2px 0 4px; }
.practice-head {
  font-family:var(--sans); font-weight:700; font-size:13px;
  letter-spacing:1px; text-transform:uppercase; color:var(--faint);
  margin:22px 0 0;
}

.link-list { list-style:none; padding:0; margin:18px 0 0; }
.link-list li { padding:10px 0; border-bottom:1px solid var(--line); display:flex; align-items:center; }
.link-list a { font-size:18px; flex:1; }

/* Problem card */
.q { padding:26px 0; border-bottom:1px solid var(--line); }
.q-tag {
  font-family:var(--sans); font-size:12.5px; font-weight:700;
  color:var(--accent); text-transform:uppercase;
  display:flex; gap:9px; align-items:center;
}
.q-tag .lvl {
  background:#fff; border:1px solid var(--rule); color:var(--soft);
  padding:2px 9px; border-radius:999px; font-size:11px;
}
.chips { display:flex; flex-wrap:wrap; gap:6px; margin:8px 0 2px; }
.chip {
  font-family:var(--sans); font-size:11px; font-weight:600;
  padding:3px 9px; border-radius:999px; border:1px solid var(--rule);
}
.chip.cat { background:var(--accent); color:#fff; border-color:var(--accent); }
.chip.cat2 { background:var(--accent-bg); color:var(--accent-d); }
.chip.tech { background:#fff; color:var(--soft); }
.q-body { font-size:18.5px; }
.q-body p { margin:.5em 0; }

/* Inline math helpers (legacy from render.py) - replace with KaTeX in Phase A2 */
.frac { display:inline-flex; flex-direction:column; vertical-align:middle; text-align:center; margin:0 .12em; font-size:.9em; }
.frac .n { border-bottom:1.4px solid var(--ink); padding:0 .35em; }
.frac .d { padding:0 .35em; }
var { font-style:italic; }
.sq { vertical-align:super; font-size:.72em; }

.choices { display:flex; flex-wrap:wrap; gap:8px 14px; margin:14px 0 2px; }
.choices .c { white-space:nowrap; margin-right:12px; }
.choices .c b { color:var(--accent-d); margin-right:3px; }

figure { margin:18px 0; text-align:center; }
figure img, figure svg { max-width:100%; height:auto; }
figure img { border:1px solid #f1ece1; border-radius:12px; padding:8px; background:#fff; }
figcaption { font-family:var(--sans); font-size:12px; color:var(--faint); margin-top:6px; }

.grid-fig { border-collapse:separate; border-spacing:4px; margin:12px auto; font-family:var(--sans); font-weight:700; }
.grid-fig td { width:32px; height:32px; text-align:center; border-radius:7px; font-size:15px; }
.v1 { background:#eef3ef; color:#5b6f66; }
.v2 { background:#cfe2d9; color:#2f6f5e; }
.v3 { background:#2f6f5e; color:#fff; }

/* Reveals */
details { margin-top:12px; border:1px solid var(--rule); border-radius:12px; background:#fff; overflow:hidden; }
summary {
  cursor:pointer; list-style:none;
  font-family:var(--sans); font-weight:700; font-size:14px;
  padding:11px 15px; color:var(--accent-d);
}
summary::-webkit-details-marker { display:none; }
details.hint summary { color:var(--gold); }
details.hint { border-color:#ecdcbb; background:#fffdf6; }
.reveal { padding:2px 15px 15px; font-size:17px; }
.hint .reveal { color:#6b5320; }

.steps { counter-reset:s; margin:6px 0 0; padding:0; list-style:none; }
.steps li { position:relative; padding:7px 0 7px 42px; border-top:1px dashed var(--line); }
.steps li:first-child { border-top:none; }
.steps li::before {
  counter-increment:s; content:counter(s, decimal-leading-zero);
  position:absolute; left:0; top:8px;
  font-family:var(--sans); font-weight:700; font-size:12px; color:#fff;
  background:var(--step); width:27px; height:23px; border-radius:7px;
  display:grid; place-items:center;
}

.ans {
  margin-top:12px; display:inline-flex; align-items:center; gap:10px;
  font-weight:700; background:var(--accent-bg);
  border:1px solid #cfe3da; color:var(--accent-d);
  padding:9px 15px; border-radius:11px;
  font-family:var(--sans); font-size:15px;
}
.ans .ltr {
  background:var(--accent); color:#fff;
  width:25px; height:25px; border-radius:7px;
  display:grid; place-items:center;
}

/* MAA "Another way" alternate solutions */
.alternate { margin-top:18px; padding-top:14px; border-top:1px dashed var(--rule); }
.alt-title { font-family:var(--sans); font-weight:700; font-size:12.5px; letter-spacing:.4px;
  text-transform:uppercase; color:var(--accent); margin-bottom:6px; }
.alt-name { text-transform:none; letter-spacing:0; color:var(--soft); font-weight:600; }

/* Nav layout: handle pushed to the right */
.crumb { display:flex; align-items:center; flex-wrap:wrap; gap:0; }
.crumb .auth-nav { margin-left:auto; font-family:var(--sans); font-size:13px; }

/* Auth forms */
.auth-form { max-width:380px; margin:18px 0; display:flex; flex-direction:column; gap:14px; }
.auth-form label { display:flex; flex-direction:column; gap:6px; font-family:var(--sans); font-size:14px; font-weight:600; color:var(--ink); }
.auth-form input { font-family:var(--sans); font-size:17px; padding:10px 12px; border:1px solid var(--rule); border-radius:10px; background:#fff; }
.auth-form input:focus { outline:2px solid var(--accent); }
.auth-form .small { font-size:12.5px; margin:-4px 0 0; }
button.primary, .auth-form button {
  font-family:var(--sans); font-weight:700; font-size:15px;
  background:var(--accent); color:#fff; border:none;
  padding:11px 18px; border-radius:10px; cursor:pointer;
}
button.primary:hover, .auth-form button:hover { background:var(--accent-d); }
button.secondary {
  font-family:var(--sans); font-weight:600; font-size:13px;
  background:#fff; color:var(--soft); border:1px solid var(--rule);
  padding:7px 14px; border-radius:8px; cursor:pointer;
}
.flash { padding:10px 14px; margin:10px 0; background:#fff3cd; border:1px solid #ecdcbb; border-radius:8px; font-size:14px; color:#6b5320; }
.logout-form { margin-top:30px; }
.small { font-size:12.5px; }

/* Status chips */
.status-chip { font-family:var(--sans); font-size:11px; font-weight:700; padding:2px 8px; border-radius:999px; margin-left:6px; text-transform:none; letter-spacing:0; }
.status-correct { background:#e1f5e7; color:#1f6f3a; border:1px solid #b6dbc1; }
.status-wrong   { background:#fbe7e3; color:#8a3826; border:1px solid #e8c6bd; }
.status-tough   { background:#fff1d6; color:#8a5a16; border:1px solid #eed8a6; }
.status-easy    { background:#e9f1ed; color:var(--accent-d); border:1px solid #cfe3da; }
.status-got-it  { background:#e9f1ed; color:var(--accent-d); border:1px solid #cfe3da; }
.status-follow-up { background:#f0e5fa; color:#5e3b8c; border:1px solid #d9c2ef; }

/* Choice buttons (clickable) */
.choices-buttons { display:flex; flex-wrap:wrap; gap:8px; margin:14px 0 2px; }
.choice-btn {
  font-family:var(--serif); font-size:17px;
  background:#fff; border:1.5px solid var(--rule); color:var(--ink);
  padding:8px 14px; border-radius:10px; cursor:pointer;
  display:inline-flex; align-items:center; gap:6px;
  transition: background 0.1s, border-color 0.1s;
}
.choice-btn:hover { border-color:var(--accent); background:var(--accent-bg); }
.choice-btn b { color:var(--accent-d); }
.choice-btn.chosen { border-color:var(--accent); }
.choice-btn.correct { border-color:#2e9e5b; background:#e1f5e7; }
.choice-btn.correct b { color:#1f6f3a; }
.choice-btn.wrong { border-color:#c14d34; background:#fbe7e3; color:#8a3826; }
.choice-btn.wrong b { color:#8a3826; }

.answer-feedback { margin-top:10px; font-family:var(--sans); font-size:14px; padding:8px 12px; border-radius:8px; }
.answer-feedback.ok  { background:#e1f5e7; color:#1f6f3a; border:1px solid #b6dbc1; }
.answer-feedback.no  { background:#fbe7e3; color:#8a3826; border:1px solid #e8c6bd; }
.answer-feedback.err { background:#fff3cd; color:#6b5320; border:1px solid #ecdcbb; }
.answer-feedback.pending { color:var(--faint); }

/* Mark row (subtle, tucked at the bottom of each card) */
.mark-row {
  margin-top:14px; padding-top:10px; border-top:1px dashed var(--line);
  font-family:var(--sans); font-size:12px; color:var(--faint);
  display:flex; flex-wrap:wrap; align-items:center; gap:6px;
}
.mark-btn {
  font-family:var(--sans); font-size:12px;
  background:transparent; border:1px solid var(--rule); color:var(--soft);
  padding:3px 9px; border-radius:999px; cursor:pointer;
}
.mark-btn:hover { background:#fff; border-color:var(--accent); color:var(--accent-d); }
.mark-btn.active { background:var(--accent); color:#fff; border-color:var(--accent); }
.mark-btn.mark-clear { color:var(--faint); }
.mark-note { font-size:11.5px; }
.mark-note a { color:var(--soft); }

/* Range filter bar */
.range-bar {
  display:flex; flex-wrap:wrap; gap:6px; align-items:center;
  margin:18px 0 4px; padding:10px 14px;
  background:#fff; border:1px solid var(--rule); border-radius:12px;
  font-family:var(--sans); font-size:13px;
  position:sticky; top:48px; z-index:5;
}
.range-label { color:var(--soft); font-weight:700; margin-right:4px; }
.range-btn {
  font-family:var(--sans); font-size:13px; font-weight:600;
  background:#fff; border:1px solid var(--rule); color:var(--soft);
  padding:5px 11px; border-radius:999px; cursor:pointer;
}
.range-btn:hover { border-color:var(--accent); color:var(--accent-d); }
.range-btn.active { background:var(--accent); color:#fff; border-color:var(--accent); }

/* Dashboard */
.mark-bucket { margin:10px 0; }

/* Band / topic / order checkboxes (focused practice form) */
.band-form {
  background:#fff; border:1px solid var(--rule); border-radius:12px;
  padding:14px 18px; margin:18px 0; display:flex; flex-direction:column; gap:10px;
}
.band-row { display:flex; flex-wrap:wrap; gap:8px; align-items:center; }
.band-check, .topic-check {
  display:inline-flex; align-items:center; gap:5px;
  font-family:var(--sans); font-size:13px; font-weight:600;
  border:1px solid var(--rule); border-radius:999px;
  padding:5px 11px; cursor:pointer; background:#fff; color:var(--soft);
  user-select:none;
}
.band-check input, .topic-check input { margin:0; cursor:pointer; }
.band-check:hover, .topic-check:hover { border-color:var(--accent); color:var(--accent-d); }
.band-check.checked, .topic-check.checked {
  background:var(--accent-bg); border-color:var(--accent); color:var(--accent-d);
}
.band-count {
  display:inline-flex; align-items:center; gap:6px;
  font-family:var(--sans); font-size:13px; color:var(--soft); margin-left:auto;
}
.band-count input { width:64px; padding:5px 8px; font-size:14px; border:1px solid var(--rule); border-radius:6px; }

select.year-select {
  font-family:var(--sans); font-size:14px; font-weight:600; color:var(--ink);
  background:#fff; border:1.5px solid var(--rule); border-radius:8px;
  padding:6px 10px; cursor:pointer;
}
select.year-select:focus { outline:2px solid var(--accent); border-color:var(--accent); }

/* Letter-only choice buttons (for image-figure problems) */
.choice-btn.letter-only {
  min-width:54px; justify-content:center; font-size:18px;
}

/* Test mode: hide hints + solutions; suppress feedback; hide prior-attempt clues */
.test-mode details.hint,
.test-mode details:not(.hint),
.test-mode .answer-feedback,
.test-mode .q-tag .status-chip,
.test-mode .mark-row { display:none !important; }
.test-mode .choice-btn.chosen { border-color:var(--accent); background:var(--accent-bg); }
.test-mode .choice-btn { background:#fff !important; border-color:var(--rule) !important; color:var(--ink) !important; }
.test-mode .choice-btn.chosen { background:var(--accent-bg) !important; border-color:var(--accent) !important; }
.test-submit-bar {
  position:sticky; bottom:0; padding:14px 16px; margin-top:30px;
  background:rgba(251,248,241,0.95); backdrop-filter:blur(6px);
  border-top:2px solid var(--ink); text-align:center; z-index:6;
}
#test-results { margin-top:10px; font-family:var(--sans); font-size:15px; color:var(--accent-d); }
.test-link { background:var(--accent) !important; color:#fff !important; border-color:var(--accent) !important; }
.test-link:hover { background:var(--accent-d) !important; }

/* Test history table */
table.key th { font-family:var(--sans); font-size:12px; text-transform:uppercase; color:var(--faint); padding:6px 10px; text-align:left; }
table.key td:first-child { font-weight:600; color:var(--ink); }

/* Leaderboard */
table.lb { width:100%; }
table.lb .lb-rank { font-family:var(--sans); font-weight:700; color:var(--faint); width:2.5em; text-align:right; }
table.lb tr.lb-me { background:var(--accent-bg, #f3f8f3); }
table.lb tr.lb-me td:first-child { color:var(--accent-d); }

/* Test mode: hide hints + solutions; suppress feedback; hide prior-attempt clues */
.test-mode details.hint,
.test-mode details:not(.hint),
.test-mode .answer-feedback,
.test-mode .q-tag .status-chip,
.test-mode .mark-row { display:none !important; }
.test-mode .choice-btn.chosen { border-color:var(--accent); background:var(--accent-bg); }
.test-mode .choice-btn { background:#fff !important; border-color:var(--rule) !important; color:var(--ink) !important; }
.test-mode .choice-btn.chosen { background:var(--accent-bg) !important; border-color:var(--accent) !important; }
.test-submit-bar {
  position:sticky; bottom:0; padding:14px 16px; margin-top:30px;
  background:rgba(251,248,241,0.95); backdrop-filter:blur(6px);
  border-top:2px solid var(--ink); text-align:center; z-index:6;
}
#test-results { margin-top:10px; font-family:var(--sans); font-size:15px; color:var(--accent-d); }
.test-link { background:var(--accent) !important; color:#fff !important; border-color:var(--accent) !important; }
.test-link:hover { background:var(--accent-d) !important; }

footer {
  margin:46px 20px 24px; padding:20px 0 0;
  border-top:1px solid var(--rule);
  font-family:var(--sans); font-size:12px; color:var(--faint); text-align:center;
}

@media (max-width:520px) {
  h1 { font-size:28px; }
  body { font-size:17px; }
}