/* Polish layer over the base styles in index.html: warm paper palette, softer cards,
   a calmer header, clearer student flow. Loaded after the inline <style>, so it overrides it. */
:root {
  --bg: #f5f1e8;
  --surface: #fffefb;
  --paper: #fffdf6;
  --ink: #1c1f2b;
  --muted: #6a6878;
  --line: #e6e0d2;
  --rule: rgba(70, 100, 180, .14);
  --accent: #2c3fb8;
  --accent-soft: #eaecfa;
  --pen: #c8312b;
  --pen-soft: #fbe9e6;
  --ok: #1f7a4a;
  --ok-soft: #e3f2e8;
  --warn: #9a6512;
  --warn-soft: #f9efd9;
  --shadow: 0 1px 0 rgba(60, 45, 20, .04), 0 1px 2px rgba(60, 45, 20, .05), 0 14px 34px -18px rgba(60, 45, 20, .22);
  --shadow-lift: 0 1px 0 rgba(60, 45, 20, .05), 0 18px 40px -16px rgba(60, 45, 20, .28);
  --r: 18px;
  --ring: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background:
    radial-gradient(1200px 520px at 85% -10%, rgba(200, 49, 43, .07), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(44, 63, 184, .06), transparent 60%),
    radial-gradient(rgba(60, 45, 20, .07) 1px, transparent 1px) 0 0 / 22px 22px,
    var(--bg);
  -webkit-font-smoothing: antialiased;
}
main { flex: 1; padding-block: 28px 56px; }
::selection { background: color-mix(in srgb, var(--pen) 22%, transparent); }

/* ---------- header ---------- */
.top { background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent); }
body::before { background: var(--bg); }
.top .wrap { padding-block: 12px; }
.brand { font-size: 1.28rem; letter-spacing: -.01em; gap: 12px; }
.brand svg { width: 36px; height: 36px; filter: drop-shadow(0 2px 4px rgba(200, 49, 43, .18)); }
.brand > div { line-height: 1.05; }
.brand-sub { color: var(--pen); font-family: var(--f-pen); font-size: 1.55rem; font-weight: 700; margin-left: 2px; }
.brand small { display: block; margin-top: 3px; font-size: .76rem; letter-spacing: .01em; }
.tabs { background: color-mix(in srgb, var(--line) 55%, transparent); border-radius: 12px; padding: 4px; }
.tabs button { border-radius: 9px; padding: 7px 14px; transition: color .15s, background .15s; }
.tabs button:hover:not([aria-pressed="true"]):not([disabled]) { color: var(--ink); }
.tabs button[disabled] { opacity: .45; cursor: not-allowed; }
.status { background: var(--surface); border: 1px solid var(--line); padding: 5px 11px 5px 9px; border-radius: 999px; font-weight: 500; }
.dot { box-shadow: 0 0 0 3px color-mix(in srgb, var(--warn) 18%, transparent); }
.dot.on { box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 18%, transparent); }

/* ---------- surfaces ---------- */
.card, .brief, .sheet { border-radius: var(--r); border-color: var(--line); box-shadow: var(--shadow); background: var(--surface); }
.card, .brief { padding: 24px 26px; }
.card h3, .sec-title h3 { font-size: 1.14rem; letter-spacing: -.005em; }
.banner { border-radius: 12px; padding: 12px 16px; }
.eyebrow { letter-spacing: .1em; color: color-mix(in srgb, var(--muted) 90%, var(--pen)); }

/* ---------- controls ---------- */
input[type="text"], input[type="number"], input[type="date"], input[type="password"], input[type="email"], input:not([type]), select, textarea {
  background: #fff; border: 1px solid var(--line); border-radius: 11px; padding: 10px 12px; font: inherit; color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
input:hover, select:hover, textarea:hover { border-color: color-mix(in srgb, var(--muted) 45%, var(--line)); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: var(--ring); }
label.l, .field > label { font-weight: 600; font-size: .82rem; color: color-mix(in srgb, var(--ink) 75%, var(--muted)); }

.btn { border-radius: 12px; padding: 10px 16px; font-size: .9rem; transition: transform .12s ease, box-shadow .15s, background .15s, border-color .15s; }
.btn:hover:not([disabled]) { transform: translateY(-1px); box-shadow: 0 6px 16px -10px rgba(30, 30, 60, .45); }
.btn:active:not([disabled]) { transform: translateY(0); }
.btn:focus-visible, .tabs button:focus-visible, .seg button:focus-visible, .aitem:focus-visible, .subtabs button:focus-visible { outline: none; box-shadow: var(--ring); }
.btn.primary { background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 88%, #fff), var(--accent)); border-color: color-mix(in srgb, var(--accent) 80%, #000); }
.btn.pen { background: linear-gradient(180deg, color-mix(in srgb, var(--pen) 88%, #fff), var(--pen)); border-color: color-mix(in srgb, var(--pen) 80%, #000); padding: 13px 22px; font-size: 1rem; border-radius: 14px; box-shadow: 0 10px 24px -14px rgba(200, 49, 43, .8); }
.btn.pen[disabled] { background: color-mix(in srgb, var(--pen) 35%, var(--surface)); border-color: transparent; box-shadow: none; opacity: 1; }
.btn.ghost:hover:not([disabled]) { box-shadow: none; color: var(--ink); background: color-mix(in srgb, var(--line) 50%, transparent); }
.seg { border-radius: 12px; background: color-mix(in srgb, var(--line) 45%, transparent); border: 0; padding: 4px; gap: 2px; }
.seg button { background: transparent; border: 0; border-radius: 9px; padding: 8px 14px; font-weight: 500; transition: background .15s, color .15s; }
.seg button:hover:not([aria-pressed="true"]) { color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, .08), 0 2px 8px -4px rgba(0, 0, 0, .15); }
.check { background: #fff; border-radius: 12px; transition: border-color .15s, background .15s; }
.check:has(input:checked) { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: color-mix(in srgb, var(--accent-soft) 45%, #fff); }
.chip { padding: 3px 10px; font-weight: 600; letter-spacing: .005em; }
details summary { list-style: none; display: inline-flex; align-items: center; gap: 6px; }
details summary::-webkit-details-marker { display: none; }
details summary::before { content: ""; width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(-45deg); transition: transform .15s; margin-right: 2px; }
details[open] > summary::before { transform: rotate(45deg); }

/* ---------- student ---------- */
.student { max-width: 860px; gap: 22px; }
.brief { position: relative; overflow: hidden; padding: 30px 32px 26px 40px; gap: 14px; }
.brief::before { content: ""; position: absolute; left: 22px; top: 0; bottom: 0; width: 2px; background: color-mix(in srgb, var(--pen) 45%, transparent); }
.brief h2 { font-size: clamp(1.55rem, 1.2rem + 1.4vw, 2.2rem); letter-spacing: -.02em; line-height: 1.1; }
.brief .cerinta { font-size: 1.04rem; line-height: 1.7; color: color-mix(in srgb, var(--ink) 88%, var(--muted)); }
.student > .card:not(.result .card) { padding: 28px 32px; gap: 16px; }
.student h3 { display: flex; align-items: center; gap: 10px; }
.h-step { margin-top: 8px; }
.step { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--ink); color: var(--bg); font: 700 .8rem var(--f-ui); flex: none; }
.drop { border: 2px dashed color-mix(in srgb, var(--muted) 30%, var(--line)); border-radius: 16px; padding: 34px 20px; background: #fff; gap: 8px; color: var(--muted); }
.drop:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent-soft) 40%, #fff); }
.drop:hover .drop-ico { transform: translateY(-3px); }
.drop.over { border-style: solid; }
.drop b { color: var(--ink); font-size: 1.12rem; }
.drop-ico { width: 52px; height: 52px; color: color-mix(in srgb, var(--ink) 55%, var(--muted)); transition: transform .2s ease; margin-bottom: 4px; }
.drop:has(input:focus-visible) { box-shadow: var(--ring); border-color: var(--accent); }
.filecard { background: #fff; border-radius: 14px; padding: 14px 16px; border-left: 4px solid var(--ok); }
.paste { border-radius: 14px; padding: 16px; line-height: 1.7; min-height: 220px; }
.progress { border-radius: 14px; padding: 16px 18px; position: relative; overflow: hidden; background: color-mix(in srgb, var(--accent-soft) 70%, #fff); border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent); }
.progress::after { content: ""; position: absolute; left: 0; bottom: 0; height: 3px; width: 40%; background: linear-gradient(90deg, transparent, var(--pen), transparent); animation: sweep 1.6s ease-in-out infinite; }
@keyframes sweep { from { transform: translateX(-100%); } to { transform: translateX(260%); } }
@media (prefers-reduced-motion: reduce) { .progress::after { animation: none; } .btn, .drop-ico { transition: none; } }

/* ---------- result ---------- */
.scorehead { gap: 28px; }
.stamp { width: 132px; height: 132px; border-width: 3px; background: radial-gradient(circle, #fff 55%, color-mix(in srgb, var(--pen-soft) 60%, #fff)); box-shadow: 0 0 0 6px color-mix(in srgb, var(--pen) 7%, transparent); }
.stamp .n { font-size: 4.6rem; }
.bar { height: 7px; background: color-mix(in srgb, var(--line) 70%, transparent); }
.bar i { background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 70%, #fff), var(--accent)); }
.crow { padding: 14px 0; }
.page { border-radius: 10px; box-shadow: inset 0 0 0 1px var(--line), 0 10px 26px -20px rgba(60, 45, 20, .45); border: 0; }
.note { border-radius: 0 10px 10px 0; padding: 8px 12px; transition: background .15s; }
.note:hover { background: color-mix(in srgb, var(--pen-soft) 50%, var(--paper)); }
.imgcard { border-radius: 14px; }

/* ---------- teacher ---------- */
.desk { grid-template-columns: 290px minmax(0, 1fr); gap: 26px; }
.aitem { border-radius: 14px; padding: 12px 14px; background: var(--surface); transition: border-color .15s, box-shadow .15s, transform .12s; position: relative; }
.aitem:hover { border-color: color-mix(in srgb, var(--muted) 35%, var(--line)); transform: translateX(2px); }
.aitem[aria-current="true"] { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); box-shadow: var(--ring); }
.aitem[aria-current="true"]::before { content: ""; position: absolute; left: -1px; top: 12px; bottom: 12px; width: 3px; border-radius: 0 3px 3px 0; background: var(--accent); }
.newbox { border-radius: 14px; background: color-mix(in srgb, var(--surface) 60%, transparent); padding: 14px; border-color: color-mix(in srgb, var(--muted) 30%, var(--line)); }
.sheet-head { padding: 24px 28px 0; }
.sheet-head h2 { font-size: 1.6rem; letter-spacing: -.015em; }
.subtabs { padding: 0 28px; gap: 22px; }
.subtabs button { padding: 12px 0; transition: color .15s; }
.subtabs button:hover { color: var(--ink); }
.subtabs button[aria-pressed="true"] { border-bottom-width: 2.5px; }
.sheet-body { padding: 24px 28px 28px; gap: 30px; }
.share { border-radius: 16px; padding: 18px 20px; background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent-soft) 40%, #fff)); border: 1px solid color-mix(in srgb, var(--accent) 16%, transparent); }
.share-row input { background: #fff; }
.savebar { background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); padding: 14px 28px; border-radius: 0 0 var(--r) var(--r); }
table.subs tbody tr { transition: background .12s; }
table.subs tbody tr:hover { background: color-mix(in srgb, var(--accent-soft) 40%, transparent); }
.drawer { backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); }
.drawer-panel { box-shadow: -20px 0 50px -20px rgba(0, 0, 0, .35); }
.toast { border-radius: 12px; padding: 11px 18px; box-shadow: 0 14px 30px -12px rgba(0, 0, 0, .45); }

/* ---------- teacher sign-in ---------- */
.login { max-width: 460px; margin: 6vh auto 0; padding: 34px 34px 30px; gap: 12px; text-align: left; }
.login h2 { font-size: 1.8rem; letter-spacing: -.02em; }
.login p { margin: 0 0 6px; line-height: 1.6; }
.login form { flex-wrap: nowrap; }
.login input { flex: 1; min-width: 0; }

/* ---------- footer ---------- */
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: .8rem; padding: 18px 0 calc(18px + env(safe-area-inset-bottom, 0px)); text-align: center; }

/* ---------- small screens ---------- */
@media (max-width: 860px) {
  .desk { grid-template-columns: minmax(0, 1fr); }
  .status { display: none; }
}
@media (max-width: 560px) {
  main { padding-block: 18px 40px; }
  .brief { padding: 22px 20px 20px 30px; }
  .brief::before { left: 14px; }
  .student > .card:not(.result .card), .card { padding: 20px 18px; }
  .brand small { display: none; }
  .btn.pen { width: 100%; justify-content: center; }
  .login { padding: 26px 22px; margin-top: 2vh; }
  .login form { flex-wrap: wrap; }
  .login form .btn { width: 100%; justify-content: center; }
}
.tabs:empty { display: none; }
.tabs:empty + .status { margin-left: auto; }

/* ---------- teacher hub / student separation ---------- */
.aitem { padding-right: 46px; }
.badge { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); min-width: 24px; height: 24px; padding: 0 7px; border-radius: 999px; background: var(--pen); color: #fff; font: 700 .76rem/24px var(--f-ui); text-align: center; font-style: normal; box-shadow: 0 4px 10px -4px rgba(200, 49, 43, .7); }
.linkbtn { border: 0; background: none; padding: 0; font: inherit; font-weight: 600; color: var(--accent); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.linkbtn:hover { text-decoration-color: currentColor; }
.status .linkbtn { margin-left: 4px; font-size: .78rem; }
a.btn { text-decoration: none; color: inherit; }
.authform { display: grid; gap: 12px; }
.authform .btn { justify-content: center; margin-top: 4px; }
.auth-switch { font-size: .88rem; color: var(--muted); text-align: center; padding-top: 4px; }
body.is-student .status:empty { display: none; }
.sent { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 14px; background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 25%, transparent); }
.sent svg { width: 26px; height: 26px; flex: none; color: #fff; background: var(--ok); border-radius: 50%; padding: 4px; }
.sent b { display: block; }
.sent span { font-size: .88rem; color: color-mix(in srgb, var(--ink) 75%, var(--muted)); }
.gsi-wrap { display: flex; justify-content: center; min-height: 44px; }
.or { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: .8rem; margin: 2px 0; }
.or::before, .or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.foot a { color: inherit; }
.credits { font-weight: 700; color: var(--ok); padding-right: 8px; margin-right: 2px; border-right: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.credits.out { color: var(--pen); }

/* ---------- buying credits ---------- */
button.credits { border: 0; background: none; font: inherit; font-weight: 700; color: var(--ok); cursor: pointer; padding: 0 8px 0 0; }
button.credits.out { color: var(--pen); }
button.credits b { display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: currentColor; color: #fff; font-size: .8rem; margin-left: 2px; }
button.credits b { color: var(--surface); }
.buybanner { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.buybanner .btn.pen { padding: 9px 16px; font-size: .9rem; }
/* Guest trial: a calm accent banner, not a warning. */
.trialbanner { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 25%, transparent); }
.trialbanner .btn { padding: 9px 16px; font-size: .9rem; }
.modal { position: fixed; inset: 0; z-index: 40; background: color-mix(in srgb, var(--ink) 40%, transparent); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); display: grid; place-items: center; padding: 16px; }
.modal-panel { background: var(--surface); border-radius: 22px; width: min(640px, 100%); padding: 26px 28px; display: grid; gap: 14px; box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .4); }
.modal-panel p { margin: 0; }
.packs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 560px) { .packs { grid-template-columns: minmax(0, 1fr); } }
.pack { position: relative; display: grid; justify-items: center; gap: 2px; padding: 22px 12px 18px; border: 1px solid var(--line); border-radius: 16px; background: #fff; cursor: pointer; font: inherit; color: var(--ink); transition: border-color .15s, transform .12s, box-shadow .15s; }
.pack:hover:not([disabled]) { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.pack[disabled] { opacity: .6; cursor: not-allowed; }
.pack.best { border: 2px solid var(--pen); }
.pack .tag { position: absolute; top: -10px; background: var(--pen); color: #fff; font-size: .7rem; font-weight: 700; padding: 2px 10px; border-radius: 999px; text-transform: uppercase; letter-spacing: .05em; }
.pack b { font: 700 2.2rem/1 var(--f-display); }
.pack span { color: var(--muted); font-size: .85rem; }
.pack strong { margin-top: 8px; font-size: 1.15rem; }
.pack small { color: var(--muted); font-size: .76rem; }