/* Course-file upload page (/file-upload/). Builds on cs2040c/assets/cs.css + assets/lumina-ui.css (the shared course look). */
[hidden] { display: none !important; }
.card { background: #fff; border: 1px solid var(--lu-line); border-radius: var(--lu-r); box-shadow: var(--lu-shadow); padding: 18px 20px; margin: 18px 0; }
.card h2 { margin: 0 0 8px; font-size: 22px; }
.card.center { text-align: center; padding: 30px 20px; }
.cardhead { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.pf { margin: 4px 0; line-height: 1.7; }
form.card label { display: block; font-size: 14px; font-weight: 600; color: var(--lu-ink); margin: 10px 0 0; }
form.card input:not([type]), form.card input[type="text"], form.card select, form.card textarea, fieldset > input {
  display: block; width: 100%; box-sizing: border-box; margin-top: 5px; font: 15.5px/1.4 var(--lu-sans); color: var(--lu-ink);
  padding: 9px 11px; border: 1.5px solid var(--lu-line); border-radius: 10px; background: #fff;
}
form.card input:focus, form.card select:focus, form.card textarea:focus { outline: none; border-color: var(--lu-primary); box-shadow: 0 0 0 3px rgba(91, 78, 240, .14); }
form.card textarea { resize: vertical; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
fieldset { border: 0; padding: 0; margin: 14px 0 0; }
legend { font-size: 14px; font-weight: 600; padding: 0; }
.seg { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.seg label { margin: 0 !important; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: inline-block; padding: 6px 14px; border: 1.5px solid var(--lu-line); border-radius: 999px; font-weight: 500; cursor: pointer; background: #fff; }
.seg input:checked + span { border-color: var(--lu-primary); background: rgba(91, 78, 240, .1); color: var(--lu-primary); font-weight: 600; }
.seg input:focus-visible + span { box-shadow: 0 0 0 3px rgba(91, 78, 240, .25); }
label.check { display: flex !important; gap: 10px; align-items: flex-start; font-weight: 400 !important; font-size: 14px !important; color: var(--lu-muted) !important; margin-top: 16px !important; }
label.check input { margin-top: 4px; width: 17px; height: 17px; flex: none; accent-color: var(--lu-primary); }

.zones { display: grid; gap: 12px; margin: 16px 0 6px; }
.zone { border: 1.5px solid var(--lu-line); border-radius: 14px; padding: 12px 14px; background: #fcfbff; }
.zhead { display: flex; align-items: center; gap: 8px; font-size: 16px; }
.zone p { margin: 4px 0 8px; }
.req, .opt { font-size: 11.5px; font-weight: 600; letter-spacing: .02em; padding: 1px 8px; border-radius: 999px; }
.req { background: rgba(236, 72, 153, .12); color: #be185d; }
.opt { background: rgba(6, 182, 212, .12); color: #0e7490; }
label.drop { display: flex !important; flex-direction: column; align-items: center; gap: 2px; margin: 0 !important; padding: 16px; border: 2px dashed #cfc9f3; border-radius: 12px; background: #fff; cursor: pointer; text-align: center; font-weight: 500 !important; transition: border-color .15s, background .15s; }
label.drop:hover, label.drop.on { border-color: var(--lu-primary); background: rgba(91, 78, 240, .05); }
label.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
label.drop u { color: var(--lu-primary); }
label.drop small { color: var(--lu-muted); font-weight: 400; font-size: 12.5px; }
ul.files, ul.plist { list-style: none; margin: 8px 0 0; padding: 0; }
ul.files li, ul.plist li { display: flex; gap: 10px; align-items: center; padding: 5px 2px; border-bottom: 1px solid #f0eefb; font-size: 14px; }
.fn { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fs, .st { color: var(--lu-muted); font-size: 12.5px; white-space: nowrap; }
.x { border: 0; background: none; font-size: 18px; line-height: 1; color: var(--lu-muted); cursor: pointer; padding: 0 4px; }
.x:hover { color: #be185d; }
.zerr, .bad { color: #c2410c; }
ul.plist li.ok .st { color: var(--lu-good); }
ul.plist li.bad .st { color: #c2410c; white-space: normal; }
.prog { margin-top: 12px; }
.prog .bar { height: 8px; border-radius: 99px; background: #ece9fa; overflow: hidden; }
.prog .bar i { display: block; height: 100%; width: 0; background: var(--lu-btn); transition: width .3s; }
.msg { color: var(--lu-muted); }

ul.sublist { list-style: none; margin: 0; padding: 0; }
ul.sublist li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid #f0eefb; }
.chip { font-size: 12.5px; font-weight: 600; padding: 3px 10px; border-radius: 999px; white-space: nowrap; }
.chip.wait { background: rgba(91, 78, 240, .1); color: var(--lu-primary); }
.chip.ok { background: var(--lu-good-soft); color: var(--lu-good); }
.chip.warn { background: var(--lu-nudge-soft); color: var(--lu-nudge); }
@media (max-width: 560px) { ul.sublist li { flex-direction: column; align-items: flex-start; } .card { padding: 16px 14px; } }
details.privacy summary { cursor: pointer; }
details.privacy ul { margin: 10px 0 0; padding-left: 20px; font-size: 14.5px; color: var(--lu-muted); }
details.privacy li { margin: 4px 0; }
.codecheck { margin: 8px 0 14px; font-size: 14px; line-height: 1.5; }
.codecheck:empty { display: none; }
.codecheck .ok { color: var(--lu-good); font-weight: 600; }
.codecheck .warn { color: #c2410c; }
.codecheck .have { border: 1.5px solid var(--lu-good); background: var(--lu-good-soft); border-radius: 12px; padding: 12px 14px; color: var(--lu-ink); }
.codecheck .have b { font-size: 16px; }
.codecheck .have .btn { margin-top: 8px; }
.codecheck .note { color: var(--lu-muted); }
form.card.blocked .zones, form.card.blocked .after-code { display: none; }
label.combo { position: relative; }
.combolist { position: absolute; z-index: 20; left: 0; right: 0; top: 100%; margin: 4px 0 0; padding: 4px; list-style: none; max-height: 260px; overflow: auto; background: #fff; border: 1.5px solid var(--lu-line); border-radius: 10px; box-shadow: var(--lu-shadow); font-weight: 400; }
.combolist li { padding: 7px 10px; border-radius: 7px; cursor: pointer; font-size: 14.5px; }
.combolist li:hover, .combolist li.on { background: rgba(91, 78, 240, .08); color: var(--lu-primary); }
.combolist li.free { cursor: default; color: var(--lu-muted); font-size: 13px; }
.combolist li.free:hover { background: none; color: var(--lu-muted); }
/* hero: before (lecture slide) → after (game card) */
.uhero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 28px; align-items: center; margin: 34px 0 10px; }
.uhero h1 { margin: 0; font-size: clamp(38px, 6vw, 60px); line-height: 1.02; letter-spacing: -.025em; color: var(--lu-ink); }
.uhero .grad { background: linear-gradient(100deg, #5b4ef0 0%, #a855f7 45%, #ec4899 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.uh-sub { margin: 16px 0 0; font-size: clamp(18px, 2.2vw, 21px); color: var(--lu-muted); line-height: 1.4; }
.uh-sub b { color: var(--lu-ink); }
.btn.uh-cta { font-size: 17px; padding: 12px 26px; text-decoration: none; display: inline-block; }
.uh-art { position: relative; height: 270px; }
.uh-slide { position: absolute; left: 0; top: 34px; width: 46%; padding: 14px; background: #f1f0f6; border: 1px solid #e3e1ec; border-radius: 10px; transform: rotate(-5deg); filter: grayscale(1); opacity: .8; box-shadow: 0 6px 16px -8px rgba(0,0,0,.2); }
.uh-slt { font: 600 12px/1.2 var(--lu-sans); color: #8a889c; margin-bottom: 10px; }
.uh-slide i { display: block; height: 7px; border-radius: 4px; background: #d9d7e3; margin: 8px 0; }
.uh-arrow { position: absolute; left: 38%; top: 118px; font-size: 30px; font-weight: 700; color: var(--lu-violet); animation: uhNudge 1.6s ease-in-out infinite; z-index: 2; text-shadow: 0 0 8px #fff, 0 0 8px #fff; }
.uh-game { position: absolute; right: 0; top: 0; width: 58%; background: #fff; border-radius: 16px; box-shadow: 0 2px 4px rgba(40,30,110,.06), 0 24px 48px -16px rgba(91,78,240,.45); overflow: hidden; transform: rotate(2deg); }
.uh-gh { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; background: linear-gradient(110deg, #5b4ef0, #a855f7 60%, #ec4899); color: #fff; font: 700 14px/1 var(--lu-sans); }
.uh-lv { background: rgba(255,255,255,.22); padding: 4px 9px; border-radius: 99px; font-size: 12px; }
.uh-q { padding: 14px 14px 8px; font: 600 15px/1.2 var(--lu-sans); color: var(--lu-ink); }
.uh-q b { color: var(--lu-primary); }
.uh-cells { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; padding: 0 14px; }
.uh-cells span { height: 30px; border: 1.5px solid var(--lu-line); border-radius: 7px; display: grid; place-items: center; font: 600 13px var(--lu-sans); color: var(--lu-muted); background: #fbfaff; }
.uh-cells .hit { animation: uhHit 4s ease-in-out infinite; }
.uh-cells .hit { position: relative; }
.uh-key { position: absolute; inset: -1.5px; border-radius: 7px; display: grid; place-items: center; background: var(--lu-btn); color: #fff; font: normal 700 13px var(--lu-sans); animation: uhDrop 4s ease-in-out infinite; }
.uh-ok { margin: 12px 14px 0; display: inline-block; padding: 5px 11px; border-radius: 99px; background: var(--lu-good-soft); color: var(--lu-good); font: 700 13px var(--lu-sans); animation: uhPop 4s ease-in-out infinite; }
.uh-bar { margin: 12px 14px 14px; height: 7px; border-radius: 99px; background: #ece9fa; overflow: hidden; }
.uh-bar i { display: block; height: 100%; width: 40%; background: linear-gradient(90deg, #5b4ef0, #ec4899); animation: uhBar 4s ease-in-out infinite; }
@keyframes uhNudge { 50% { transform: translateX(6px); } }
@keyframes uhDrop { 0%, 12% { transform: translateY(-44px); opacity: 0; } 22% { opacity: 1; } 36%, 100% { transform: translateY(0); opacity: 1; } }
@keyframes uhHit { 0%, 36% { border-color: var(--lu-line); background: #fbfaff; } 40%, 100% { border-color: var(--lu-good); background: var(--lu-good-soft); } }
@keyframes uhPop { 0%, 40% { transform: scale(0); opacity: 0; } 48% { transform: scale(1.12); opacity: 1; } 54%, 100% { transform: scale(1); opacity: 1; } }
@keyframes uhBar { 0%, 44% { width: 40%; } 60%, 100% { width: 72%; } }
@media (prefers-reduced-motion: reduce) { .uh-art * { animation: none !important; } .uh-cells .hit { border-color: var(--lu-good); } }
.uh-three { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 26px 0 8px; padding: 0; }
.uh-three li { background: #fff; border: 1px solid var(--lu-line); border-radius: 14px; padding: 14px 16px; font-size: 15.5px; color: var(--lu-muted); box-shadow: var(--lu-shadow); }
.uh-three b { display: block; font-size: 19px; color: var(--lu-ink); margin-bottom: 2px; }
@media (max-width: 760px) {
  .uhero { grid-template-columns: 1fr; gap: 18px; margin-top: 20px; }
  .uh-art { height: 205px; max-width: 440px; }
  .uh-three { margin-top: 6px; }
  .uh-three { grid-template-columns: 1fr; }
}
.zone p b { color: var(--lu-ink); font-weight: 600; }
label.tests { font-weight: 500 !important; font-size: 13.5px !important; color: var(--lu-muted) !important; margin-top: 10px !important; }
p.more { margin: 16px 0 0; padding: 10px 14px; border-radius: 12px; background: linear-gradient(100deg, rgba(91,78,240,.08), rgba(236,72,153,.08)); font-size: 15px; color: var(--lu-muted); }
p.more b { color: var(--lu-ink); }
form.card.blocked p.more { display: none; }
/* upload form: numbered steps */
form.card.up h2 { display: flex; align-items: center; gap: 10px; margin: 26px 0 6px; font-size: 21px; }
form.card.up h2:first-child { margin-top: 0; }
.num { flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font: 700 14px var(--lu-sans); color: #fff; background: var(--lu-btn); }
form.card.up .seg { margin-top: 8px; }
form.card.up .seg + input, form.card.up [name="test_other"] { margin-top: 8px; max-width: 360px; }
.zones.one { margin-top: 12px; }
form.card .profile legend .muted, form.card legend .muted { font-weight: 400; }
details.testdesc { margin: 14px 0 4px; border: 1px solid var(--lu-line); border-radius: 12px; padding: 10px 14px; background: #fff; }
details.testdesc summary { cursor: pointer; font-weight: 600; }
details.testdesc[open] summary { margin-bottom: 6px; }