/* StudyFrames brand — taken from the logo: navy wordmark, blue→cyan "Frames", orange fold. */
:root {
  --navy: #0b1530;
  --blue: #0a6cff;
  --cyan: #00c2ff;
  --orange: #ff9500;
  --gold: #f5b700;
  --amber: #ff9f0a;
  --ink: #0b1530;
  --muted: #5b6480;
  --line: #e3e8f2;
  --bg: #f5f7fb;
  --card: #ffffff;
  --danger: #c62828;
  --ok: #0f8a4a;
  --radius: 14px;
  font-family: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); line-height: 1.5; }
a { color: var(--blue); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; font-weight: 800; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
p { margin: 0 0 1rem; }

.topbar { background: var(--card); border-bottom: 1px solid var(--line); }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .6rem; }
.topbar img { height: 34px; display: block; }
.topbar form { margin: 0; }
.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 16px; }
main.wrap { padding-block: 1.5rem 3rem; }

.btn { display: inline-flex; align-items: center; gap: .4rem; border: 0; border-radius: 999px; padding: .6rem 1.1rem; font: inherit; font-weight: 800; cursor: pointer; text-decoration: none; background: linear-gradient(90deg, var(--blue), var(--cyan)); color: #fff; }
.btn:hover { filter: brightness(1.05); }
.btn.secondary { background: var(--card); color: var(--navy); border: 1px solid var(--line); }
.btn.orange { background: var(--orange); }
.btn.link { background: none; color: var(--muted); padding: 0; font-weight: 700; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; }
.grid { display: grid; gap: 1rem; }
.grid.cols-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.stack > * + * { margin-top: 1rem; }

.stat .n { font-size: 2rem; font-weight: 900; }
.stat .l { color: var(--muted); font-weight: 700; font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }

.eyebrow { color: var(--muted); font-weight: 700; font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; }
.pill { display: inline-block; border-radius: 999px; padding: .1rem .6rem; font-size: .8rem; font-weight: 800; background: #e8f1ff; color: var(--blue); }
.pill.anchor { background: #fff3e0; color: #b35c00; }
.pill.paid { background: #e6f6ed; color: var(--ok); }
.pill.pending { background: #fff3e0; color: #b35c00; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .4rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tfoot td { font-weight: 900; border-bottom: 0; }
.table-scroll { overflow-x: auto; }

.flash { border-radius: var(--radius); padding: .8rem 1rem; margin-bottom: 1rem; font-weight: 700; }
.flash.ok { background: #e6f6ed; color: var(--ok); }
.flash.err { background: #fdecea; color: var(--danger); }
.flash ul { margin: .25rem 0 0; padding-left: 1.2rem; font-weight: 600; }

label { display: block; font-weight: 800; margin-bottom: .3rem; }
input[type=text], input[type=password], input[type=email], input[type=file] { width: 100%; font: inherit; padding: .7rem .8rem; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
input:focus { outline: 2px solid var(--cyan); outline-offset: 1px; }
.hint { color: var(--muted); font-size: .9rem; }

.auth { min-height: 100vh; display: grid; place-items: center; padding: 16px; background: radial-gradient(1200px 500px at 20% -10%, #dff3ff, transparent), var(--bg); }
.auth .card { width: 100%; max-width: 420px; padding: 2rem; }
.auth img { width: 100%; max-width: 300px; display: block; margin: 0 auto 1.5rem; }

.tier-exam_only { border-left: 4px solid #9aa4bd; }
.tier-lite { border-left: 4px solid var(--cyan); }
.tier-basic { border-left: 4px solid var(--blue); }
.tier-premium { border-left: 4px solid var(--orange); }

.disclaimer { color: var(--muted); font-size: .8rem; margin-top: 2rem; }

/* ---------- School navigation ---------- */
.subnav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem 1rem; margin-bottom: 1.25rem; }
.subnav-school { font-weight: 900; font-size: 1.05rem; }
.subnav-links { display: flex; gap: .25rem; flex-wrap: wrap; }
.subnav-links a { text-decoration: none; color: var(--muted); font-weight: 800; padding: .4rem .8rem; border-radius: 999px; }
.subnav-links a.active, .subnav-links a:hover { background: #e8f1ff; color: var(--blue); }

.row { display: flex; gap: .75rem; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.muted { color: var(--muted); }
select, textarea, input[type=number], input[type=datetime-local], input[type=tel] { width: 100%; font: inherit; padding: .65rem .8rem; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink); }
textarea { min-height: 7rem; resize: vertical; }
.field + .field { margin-top: 1rem; }
.form-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.check { display: flex; gap: .5rem; align-items: flex-start; font-weight: 600; }
.check input { margin-top: .3rem; }
.option-row { display: grid; grid-template-columns: auto 1fr auto; gap: .6rem; align-items: center; }
.option-row + .option-row { margin-top: .5rem; }
.option-row .letter { font-weight: 900; width: 1.6rem; text-align: center; }
.pill.draft { background: #f1f3f8; color: var(--muted); }
.pill.open { background: #e6f6ed; color: var(--ok); }
.pill.scheduled { background: #e8f1ff; color: var(--blue); }
.pill.closed { background: #f1f3f8; color: var(--muted); }
.pill.late { background: #fdecea; color: var(--danger); }
.btn.small { padding: .35rem .8rem; font-size: .9rem; }
.btn.danger { background: var(--card); color: var(--danger); border: 1px solid #f3c7c3; }
.inline-form { display: inline; margin: 0; }
.bank-list { max-height: 28rem; overflow-y: auto; border: 1px solid var(--line); border-radius: 10px; }
.bank-item { display: flex; gap: .6rem; padding: .6rem .8rem; border-bottom: 1px solid var(--line); font-weight: 400; margin: 0; }
.bank-item:last-child { border-bottom: 0; }
.bank-item .meta { font-size: .8rem; color: var(--muted); }
.sfm-blank { display: inline-block; min-width: 4em; border-bottom: 2px solid currentColor; margin: 0 .2em; }
.sfm-asset { max-width: 100%; height: auto; }
.sfm p { margin: 0 0 .5rem; }
.sfm p:last-child { margin-bottom: 0; }

/* Ace states (§8.6): gold, amber, neutral */
.ace { display: inline-block; border-radius: 999px; padding: .1rem .6rem; font-size: .8rem; font-weight: 900; white-space: nowrap; }
.ace-aced { background: #fff4cc; color: #8a6400; }
.ace-nearly { background: #ffecd6; color: #a35400; }
.ace-not_yet { background: #eef0f5; color: #4a5470; }
.bar { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; min-width: 80px; }
.bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--blue), var(--cyan)); }

/* ---------- Result slips (print: one per page) ---------- */
.slip { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1.5rem; }
.slip-head { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; border-bottom: 2px solid var(--navy); padding-bottom: .8rem; margin-bottom: 1rem; }
.slip-head img { height: 30px; }
.slip-score { font-size: 2.2rem; font-weight: 900; line-height: 1; }
.slip-foot { display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: center; margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--line); }
.slip-foot img { width: 110px; height: 110px; }

/* ---------- CBT exam screen ---------- */
body.cbt { background: #eef2f8; }
.cbt-top { background: var(--navy); color: #fff; }
.cbt-top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .6rem; }
.cbt-top .who { font-weight: 800; }
.cbt-top .what { font-size: .9rem; opacity: .85; }
.cbt-timer { font-variant-numeric: tabular-nums; font-weight: 900; font-size: 1.4rem; background: rgba(255,255,255,.12); border-radius: 10px; padding: .25rem .8rem; }
.cbt-timer.low { background: var(--orange); color: var(--navy); }
.cbt-main { display: grid; grid-template-columns: 1fr 280px; gap: 1rem; padding-block: 1rem 2rem; }
@media (max-width: 820px) { .cbt-main { grid-template-columns: 1fr; } }
.cbt-q { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; min-height: 22rem; display: flex; flex-direction: column; }
.cbt-q[hidden] { display: none; }
.cbt-q .qno { font-weight: 900; color: var(--muted); margin-bottom: .6rem; }
.cbt-instruction { background: #f5f7fb; border-left: 4px solid var(--cyan); padding: .6rem .8rem; margin-bottom: .8rem; font-style: italic; }
.cbt-passage { background: #fbfbfd; border: 1px solid var(--line); border-radius: 10px; padding: .8rem; margin-bottom: .8rem; max-height: 16rem; overflow-y: auto; }
.cbt-stem { font-size: 1.1rem; margin-bottom: 1rem; }
.cbt-options { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.cbt-options label { display: flex; gap: .8rem; align-items: flex-start; border: 2px solid var(--line); border-radius: 12px; padding: .7rem .9rem; cursor: pointer; font-weight: 600; margin: 0; }
.cbt-options label:hover { border-color: #b8cdf5; }
.cbt-options input { position: absolute; opacity: 0; pointer-events: none; }
.cbt-options .lbl { font-weight: 900; min-width: 1.6rem; height: 1.6rem; border-radius: 50%; display: inline-grid; place-items: center; background: #eef2f8; flex: none; }
.cbt-options input:checked + label { border-color: var(--blue); background: #eef5ff; }
.cbt-options input:checked + label .lbl { background: var(--blue); color: #fff; }
.cbt-options input:focus-visible + label { outline: 2px solid var(--cyan); outline-offset: 2px; }
.cbt-nav { margin-top: auto; padding-top: 1rem; display: flex; justify-content: space-between; gap: .5rem; flex-wrap: wrap; }
.cbt-side { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; align-self: start; position: sticky; top: 1rem; }
.cbt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: .35rem; margin: .8rem 0; }
.cbt-grid button { font: inherit; font-weight: 800; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 8px; padding: .35rem 0; cursor: pointer; position: relative; }
.cbt-grid button.answered { background: var(--blue); border-color: var(--blue); color: #fff; }
.cbt-grid button.current { outline: 3px solid var(--cyan); outline-offset: 1px; }
.cbt-grid button.flagged::after { content: ""; position: absolute; top: 3px; right: 3px; width: 7px; height: 7px; border-radius: 50%; background: var(--orange); }
.cbt-legend { font-size: .8rem; color: var(--muted); }
.cbt-keys { font-size: .8rem; color: var(--muted); margin-top: .8rem; }
.cbt-keys kbd { border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px; padding: 0 .3rem; font-family: inherit; font-weight: 800; }
.overlay { position: fixed; inset: 0; background: rgba(11,21,48,.72); display: grid; place-items: center; padding: 16px; z-index: 50; }
.overlay[hidden] { display: none; }
.overlay .card { max-width: 460px; width: 100%; }
.preview-banner { background: var(--orange); color: var(--navy); text-align: center; font-weight: 800; padding: .4rem; }

/* ---------- Study Mode (StudyFrames' own design; never mixed with Exam Mode, §2.3) ---------- */
.frames-card { background: linear-gradient(135deg, #0b1530 0%, #0a3a8f 55%, #0a6cff 100%); color: #fff; border-radius: 20px; padding: 1.4rem; position: relative; overflow: hidden; }
.frames-card::after { content: ""; position: absolute; right: -40px; top: -40px; width: 180px; height: 180px; border-radius: 40px; background: rgba(0,194,255,.18); transform: rotate(25deg); }
.frames-card h2 { color: #fff; font-size: 1.4rem; }
.frames-card .hint { color: rgba(255,255,255,.8); }
.frames-card .btn { background: var(--orange); color: var(--navy); }
.streak { display: inline-flex; align-items: center; gap: .35rem; font-weight: 900; font-size: 1.1rem; }
.streak .flame { font-size: 1.4rem; }
.chip { display: inline-flex; align-items: center; gap: .3rem; background: rgba(255,255,255,.14); border-radius: 999px; padding: .2rem .7rem; font-weight: 800; font-size: .85rem; }
.subject-row { display: flex; align-items: center; gap: .8rem; padding: .7rem 0; border-bottom: 1px solid var(--line); }
.subject-row:last-child { border-bottom: 0; }
.subject-row .name { flex: 1; font-weight: 800; }
.ace-big { display: inline-block; border-radius: 12px; padding: .35rem .8rem; font-weight: 900; }
.aced-banner { background: linear-gradient(90deg, #fff4cc, #ffe08a); border: 2px solid var(--gold); color: #6b4d00; border-radius: 18px; padding: 1.1rem 1.3rem; text-align: center; }
.aced-banner h2 { font-size: 1.6rem; color: #6b4d00; margin: 0 0 .3rem; }

.study-top { background: var(--card); border-bottom: 1px solid var(--line); }
.study-top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .6rem; }
.study-progress { flex: 1; height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; max-width: 420px; }
.study-progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--blue), var(--cyan)); transition: width .3s; }
.study-card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 1.4rem; max-width: 780px; margin: 1.2rem auto; }
.study-card[hidden] { display: none; }
.study-meta { color: var(--muted); font-size: .85rem; font-weight: 700; margin-bottom: .6rem; }
.study-options { list-style: none; margin: 1rem 0 0; padding: 0; display: grid; gap: .55rem; }
.study-options button { width: 100%; text-align: left; font: inherit; font-weight: 600; display: flex; gap: .8rem; align-items: flex-start; border: 2px solid var(--line); background: #fff; color: var(--ink); border-radius: 14px; padding: .8rem 1rem; cursor: pointer; }
.study-options button:hover:not(:disabled) { border-color: #b8cdf5; }
.study-options .lbl { font-weight: 900; min-width: 1.7rem; height: 1.7rem; border-radius: 50%; display: inline-grid; place-items: center; background: #eef2f8; flex: none; }
.study-options button.chosen { border-color: var(--blue); background: #eef5ff; }
.study-options button.right { border-color: var(--ok); background: #e6f6ed; }
.study-options button.right .lbl { background: var(--ok); color: #fff; }
.study-options button.wrong { border-color: #e7a19b; background: #fdf0ee; }
.study-options button:disabled { cursor: default; }
.study-feedback { margin-top: 1rem; border-radius: 14px; padding: 1rem; background: #f5f7fb; }
.study-feedback[hidden] { display: none; }
.study-feedback .verdict { font-weight: 900; font-size: 1.05rem; margin-bottom: .3rem; }
.study-feedback details { margin-top: .6rem; }
.study-feedback summary { cursor: pointer; font-weight: 800; color: var(--blue); }
.study-nav { display: flex; justify-content: space-between; gap: .5rem; margin-top: 1.2rem; flex-wrap: wrap; }
.report-link { background: none; border: 0; color: var(--muted); font: inherit; font-size: .85rem; text-decoration: underline; cursor: pointer; padding: 0; }
.review-item { border-top: 1px solid var(--line); padding: 1rem 0; }
.review-item:first-child { border-top: 0; }

@media print {
  .slip { break-after: page; border: 0; padding: 0; margin: 0; border-radius: 0; }
  .slip:last-child { break-after: auto; }
  .subnav, .disclaimer { display: none !important; }
  .topbar, .no-print { display: none !important; }
  body { background: #fff; }
  .card { border: 0; padding: 0; }
}