/* Skolbesök – dark theme on top of Bootstrap 5.3 (data-bs-theme="dark"). */

@font-face { font-family: "Ubuntu"; font-weight: 400; font-display: swap; src: url("../fonts/ubuntu-latin-400.4a8b9af22b31.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Ubuntu"; font-weight: 400; font-display: swap; src: url("../fonts/ubuntu-latin-ext-400.530aea4a339a.woff2") format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Ubuntu"; font-weight: 500; font-display: swap; src: url("../fonts/ubuntu-latin-500.c6bd3f0bf07f.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Ubuntu"; font-weight: 500; font-display: swap; src: url("../fonts/ubuntu-latin-ext-500.882901bfb9a0.woff2") format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Ubuntu"; font-weight: 700; font-display: swap; src: url("../fonts/ubuntu-latin-700.9418887ae687.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Ubuntu"; font-weight: 700; font-display: swap; src: url("../fonts/ubuntu-latin-ext-700.49dea29c68f0.woff2") format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url("../fonts/jetbrains-mono-latin-400.caf0dfde4e44.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url("../fonts/jetbrains-mono-latin-ext-400.443d1c3be5b2.woff2") format("woff2"); unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }

:root,
[data-bs-theme="dark"] {
  --sb-bg: #0c101b;
  --sb-surface: #141a29;
  --sb-surface-2: #1b2337;
  --sb-surface-3: #232d45;
  --sb-border: #2a3450;
  --sb-text: #e7eaf3;
  --sb-muted: #97a1bb;
  --sb-accent: #ffab1c;
  --sb-accent-hover: #ffbf4d;
  --sb-accent-ink: #1a1203;
  --sb-ok: #3fcf8e;
  --sb-ok-bg: rgba(63, 207, 142, 0.12);
  --sb-bad: #ff6070;
  --sb-bad-bg: rgba(255, 96, 112, 0.12);
  --sb-info: #6cb2ff;

  --bs-body-bg: var(--sb-bg);
  --bs-body-color: var(--sb-text);
  --bs-secondary-color: var(--sb-muted);
  --bs-tertiary-bg: var(--sb-surface);
  --bs-border-color: var(--sb-border);
  --bs-link-color: var(--sb-accent);
  --bs-link-color-rgb: 255, 171, 28;
  --bs-link-hover-color: var(--sb-accent-hover);
  --bs-link-hover-color-rgb: 255, 191, 77;
  --bs-primary: var(--sb-accent);
  --bs-primary-rgb: 255, 171, 28;
  --bs-success-rgb: 63, 207, 142;
  --bs-danger-rgb: 255, 96, 112;
  --bs-font-sans-serif: "Ubuntu", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --bs-font-monospace: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --bs-body-font-size: 1rem;
  --bs-border-radius: 0.6rem;
  --bs-card-bg: var(--sb-surface);
}

body {
  background: var(--sb-bg);
  color: var(--sb-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1 0 auto; }

h1, h2, h3, h4, .h1, .h2, .h3, .h4 { font-weight: 700; letter-spacing: -0.01em; }

a { text-underline-offset: 0.2em; }

.text-muted, .form-text { color: var(--sb-muted) !important; }

/* --- Navbar ------------------------------------------------------------- */
.sb-nav {
  background: rgba(12, 16, 27, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--sb-border);
}
.sb-nav .navbar-brand { font-weight: 700; color: var(--sb-text); display: flex; align-items: center; gap: 0.55rem; }
.sb-brand-mark {
  display: inline-grid; place-items: center;
  width: 2rem; height: 2rem; border-radius: 0.5rem;
  background: var(--sb-accent); color: var(--sb-accent-ink);
  font-family: var(--bs-font-monospace); font-weight: 700; font-size: 1rem;
}
.sb-nav .nav-link { color: var(--sb-muted); font-weight: 500; }
.sb-nav .nav-link:hover, .sb-nav .nav-link.active { color: var(--sb-text); }
.sb-nav .nav-link.active { box-shadow: inset 0 -2px 0 var(--sb-accent); }

/* --- Buttons ------------------------------------------------------------ */
.btn-primary {
  --bs-btn-bg: var(--sb-accent); --bs-btn-border-color: var(--sb-accent); --bs-btn-color: var(--sb-accent-ink);
  --bs-btn-hover-bg: var(--sb-accent-hover); --bs-btn-hover-border-color: var(--sb-accent-hover); --bs-btn-hover-color: var(--sb-accent-ink);
  --bs-btn-active-bg: #e8960a; --bs-btn-active-border-color: #e8960a; --bs-btn-active-color: var(--sb-accent-ink);
  --bs-btn-disabled-bg: #7a5a22; --bs-btn-disabled-border-color: #7a5a22; --bs-btn-disabled-color: #1a1203;
  font-weight: 700;
}
.btn-outline-primary {
  --bs-btn-color: var(--sb-accent); --bs-btn-border-color: var(--sb-accent);
  --bs-btn-hover-bg: var(--sb-accent); --bs-btn-hover-border-color: var(--sb-accent); --bs-btn-hover-color: var(--sb-accent-ink);
  --bs-btn-active-bg: var(--sb-accent); --bs-btn-active-color: var(--sb-accent-ink);
}
.btn-ghost {
  --bs-btn-color: var(--sb-text); --bs-btn-bg: var(--sb-surface-2); --bs-btn-border-color: var(--sb-border);
  --bs-btn-hover-bg: var(--sb-surface-3); --bs-btn-hover-color: var(--sb-text); --bs-btn-hover-border-color: var(--sb-border);
  --bs-btn-active-bg: var(--sb-surface-3); --bs-btn-active-color: var(--sb-text);
}

/* --- Surfaces ----------------------------------------------------------- */
.sb-card, .card {
  background: var(--sb-surface);
  border: 1px solid var(--sb-border);
  border-radius: 0.8rem;
}
.sb-card-body { padding: 1.25rem 1.4rem; }
.form-control, .form-select {
  background-color: var(--sb-surface-2);
  border-color: var(--sb-border);
  color: var(--sb-text);
}
.form-control:focus, .form-select:focus {
  background-color: var(--sb-surface-2);
  color: var(--sb-text);
  border-color: var(--sb-accent);
  box-shadow: 0 0 0 0.2rem rgba(255, 171, 28, 0.25);
}
.form-control::placeholder { color: #66708b; }
.form-check-input:checked { background-color: var(--sb-accent); border-color: var(--sb-accent); }
.form-label { font-weight: 500; }

.table { --bs-table-bg: transparent; --bs-table-hover-bg: rgba(255, 255, 255, 0.03); --bs-table-border-color: var(--sb-border); }
.table > :not(caption) > * > * { padding: 0.6rem 0.75rem; }
.table thead th { color: var(--sb-muted); font-weight: 500; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; }

.badge-soft { background: var(--sb-surface-3); color: var(--sb-text); font-weight: 500; }
.badge-state-upcoming { background: rgba(108, 178, 255, 0.15); color: var(--sb-info); }
.badge-state-running { background: var(--sb-ok-bg); color: var(--sb-ok); }
.badge-state-ended { background: var(--sb-surface-3); color: var(--sb-muted); }

.alert { border-radius: 0.7rem; }

/* --- Hero / page header -------------------------------------------------- */
.sb-hero {
  padding: 3.5rem 0 2.5rem;
  background:
    radial-gradient(900px 300px at 15% -10%, rgba(255, 171, 28, 0.13), transparent 70%),
    radial-gradient(700px 300px at 95% 0%, rgba(108, 178, 255, 0.08), transparent 70%);
  border-bottom: 1px solid var(--sb-border);
}
.sb-hero h1 { font-size: clamp(2rem, 4vw, 3rem); }
.sb-eyebrow {
  font-family: var(--bs-font-monospace);
  font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--sb-accent);
}
.sb-code-input {
  font-family: var(--bs-font-monospace);
  text-transform: uppercase; letter-spacing: 0.3em; font-size: 1.4rem; text-align: center;
}

.page-head { padding: 2rem 0 1.25rem; }
.page-head h1 { margin: 0; }

/* --- Task cards (SSM-style grid) ---------------------------------------- */
.task-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1rem;
}
.task-card {
  position: relative;
  display: flex; flex-direction: column; gap: 0.6rem;
  padding: 1.1rem 1.2rem 1rem;
  background: var(--sb-surface);
  border: 1px solid var(--sb-border);
  border-top: 3px solid var(--sb-accent);
  border-radius: 0.8rem;
  color: var(--sb-text);
  text-decoration: none;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
  min-height: 150px;
}
.task-card:hover { transform: translateY(-2px); background: var(--sb-surface-2); color: var(--sb-text); }
.task-card .task-letter {
  font-family: var(--bs-font-monospace); font-weight: 700; color: var(--sb-accent); font-size: 0.95rem;
}
.task-card .task-title { font-size: 1.15rem; font-weight: 700; line-height: 1.25; }
.task-card .task-meta { margin-top: auto; display: flex; justify-content: space-between; align-items: center; color: var(--sb-muted); font-size: 0.85rem; }
.task-card .task-points { font-family: var(--bs-font-monospace); font-weight: 700; color: var(--sb-text); font-size: 1rem; }
.task-card.is-solved { border-top-color: var(--sb-ok); background: linear-gradient(180deg, var(--sb-ok-bg), var(--sb-surface) 60%); }
.task-card.is-solved .task-letter { color: var(--sb-ok); }
.task-card.is-practice { border-top-color: var(--sb-info); }
.solved-check {
  position: absolute; top: 0.9rem; right: 1rem;
  width: 1.6rem; height: 1.6rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--sb-ok); color: #06170f; font-weight: 700; font-size: 0.9rem;
}
.kind-chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.78rem; padding: 0.15rem 0.5rem; border-radius: 999px;
  background: var(--sb-surface-3); color: var(--sb-muted);
}
.difficulty { letter-spacing: 0.1em; color: var(--sb-accent); font-size: 0.8rem; }
.difficulty .off { color: var(--sb-surface-3); }

/* --- Statement (Kattis-like) --------------------------------------------- */
.statement {
  max-width: 72ch;
  font-size: 1.06rem;
  line-height: 1.7;
}
.statement h1, .statement h2, .statement h3 { margin-top: 1.6rem; margin-bottom: 0.6rem; }
.statement h2 { font-size: 1.35rem; }
.statement h3 { font-size: 1.15rem; }
.statement p { margin-bottom: 1rem; }
.statement img { max-width: 100%; height: auto; border-radius: 0.5rem; }
.statement table {
  border-collapse: collapse; margin: 1rem 0 1.4rem; font-size: 0.97rem;
  display: block; overflow-x: auto; max-width: 100%;
}
.statement th, .statement td { border: 1px solid var(--sb-border); padding: 0.45rem 0.8rem; }
.statement th { background: var(--sb-surface-2); font-weight: 500; }
.statement code { color: #ffd592; background: var(--sb-surface-2); padding: 0.1em 0.35em; border-radius: 0.3rem; font-size: 0.9em; }
.statement pre { background: var(--sb-surface-2); border: 1px solid var(--sb-border); border-radius: 0.6rem; padding: 0.9rem 1rem; }
.statement pre code { background: none; padding: 0; color: var(--sb-text); }
.statement blockquote { border-left: 3px solid var(--sb-accent); padding-left: 1rem; color: var(--sb-muted); }
.statement .math-display { display: block; overflow-x: auto; overflow-y: hidden; margin: 1rem 0; text-align: center; }
.statement .footnotes { font-size: 0.9rem; color: var(--sb-muted); }
.katex { font-size: 1.08em; }

.samples { margin: 1.5rem 0 2rem; }
.sample {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border: 1px solid var(--sb-border); border-radius: 0.7rem; overflow: hidden;
  margin-bottom: 1rem; background: var(--sb-surface);
}
.sample.no-input { grid-template-columns: 1fr; }
.sample-col + .sample-col { border-left: 1px solid var(--sb-border); }
.sample-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.45rem 0.8rem; background: var(--sb-surface-2);
  font-size: 0.82rem; color: var(--sb-muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 500;
}
.sample pre {
  margin: 0; padding: 0.8rem 0.9rem; font-size: 0.92rem; color: var(--sb-text);
  white-space: pre; overflow-x: auto; max-height: 22rem;
}
.sample-explanation { grid-column: 1 / -1; border-top: 1px solid var(--sb-border); padding: 0.7rem 0.9rem; font-size: 0.95rem; }
.sample-explanation p:last-child { margin-bottom: 0; }
.sample-explanation.statement { max-width: none; }
.copy-btn {
  border: 0; background: none; color: var(--sb-muted); font-size: 0.8rem; padding: 0 0.2rem; cursor: pointer;
}
.copy-btn:hover { color: var(--sb-accent); }
@media (max-width: 640px) {
  .sample { grid-template-columns: 1fr; }
  .sample-col + .sample-col { border-left: 0; border-top: 1px solid var(--sb-border); }
}

/* --- Answer box ---------------------------------------------------------- */
.answer-box {
  background: var(--sb-surface);
  border: 1px solid var(--sb-border);
  border-radius: 0.9rem;
  padding: 1.25rem;
}
.answer-box .form-control { font-family: var(--bs-font-monospace); font-size: 1.2rem; }
.verdict {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.8rem 1rem; border-radius: 0.7rem; font-weight: 700; font-size: 1.1rem;
  margin-bottom: 1rem;
  animation: pop 0.25s ease-out;
}
.verdict-ok { background: var(--sb-ok-bg); color: var(--sb-ok); border: 1px solid rgba(63, 207, 142, 0.4); }
.verdict-bad { background: var(--sb-bad-bg); color: var(--sb-bad); border: 1px solid rgba(255, 96, 112, 0.4); }
.verdict-info { background: rgba(108, 178, 255, 0.1); color: var(--sb-info); border: 1px solid rgba(108, 178, 255, 0.35); }
.verdict .verdict-icon { font-size: 1.4rem; line-height: 1; }
@keyframes pop { from { transform: scale(0.97); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.history { font-family: var(--bs-font-monospace); font-size: 0.88rem; }
.history .ok { color: var(--sb-ok); }
.history .bad { color: var(--sb-bad); }

/* --- Scoreboard ---------------------------------------------------------- */
.board { font-variant-numeric: tabular-nums; }
.board td, .board th { vertical-align: middle; white-space: nowrap; }
.board .rank { width: 3rem; font-family: var(--bs-font-monospace); color: var(--sb-muted); }
.board .score { font-family: var(--bs-font-monospace); font-weight: 700; font-size: 1.05rem; }
.board .name { white-space: normal; min-width: 10rem; }
.board .members { color: var(--sb-muted); font-size: 0.82rem; }
.board tr.is-me td { background: rgba(255, 171, 28, 0.07); }
.board tr.rank-1 .rank { color: #ffd166; font-weight: 700; }
.board tr.rank-2 .rank { color: #d9dde8; font-weight: 700; }
.board tr.rank-3 .rank { color: #e0a370; font-weight: 700; }
.board .cell-task { text-align: center; width: 3.2rem; }
.cell-solved {
  display: inline-grid; place-items: center; width: 2rem; height: 1.6rem; border-radius: 0.35rem;
  background: var(--sb-ok-bg); color: var(--sb-ok); font-weight: 700; font-size: 0.85rem;
}
.cell-empty { color: var(--sb-surface-3); }
.table-scroll { overflow-x: auto; }
.bar {
  height: 0.45rem; border-radius: 999px; background: var(--sb-surface-3); overflow: hidden; min-width: 6rem;
}
.bar > span { display: block; height: 100%; background: var(--sb-accent); }

/* --- Countdown ----------------------------------------------------------- */
.countdown {
  font-family: var(--bs-font-monospace); font-weight: 700; font-size: 1.6rem; color: var(--sb-text);
}
.countdown-label { color: var(--sb-muted); font-size: 0.85rem; }

/* --- Kattis CTA ---------------------------------------------------------- */
.kattis-cta {
  display: flex; align-items: center; gap: 1.25rem;
  padding: 1.1rem 1.4rem;
  border-radius: 1rem;
  background: linear-gradient(120deg, #1f2a44 0%, #2a2238 55%, #3a2a17 100%);
  border: 1px solid rgba(255, 171, 28, 0.35);
  color: var(--sb-text);
  text-decoration: none;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.kattis-cta:hover { transform: translateY(-2px); border-color: var(--sb-accent); color: var(--sb-text); }
.kattis-cta img { width: 88px; height: auto; flex: none; filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.4)); }
.kattis-cta .cta-title { font-size: 1.3rem; font-weight: 700; margin: 0; }
.kattis-cta .cta-title strong { color: var(--sb-accent); }
.kattis-cta .cta-sub { color: var(--sb-muted); margin: 0.15rem 0 0; }
.kattis-cta .cta-arrow { margin-left: auto; font-size: 1.6rem; color: var(--sb-accent); }
.kattis-cta.compact { padding: 0.7rem 1rem; gap: 0.9rem; }
.kattis-cta.compact img { width: 56px; }
.kattis-cta.compact .cta-title { font-size: 1.05rem; }
@media (max-width: 540px) {
  .kattis-cta { flex-direction: column; text-align: center; }
  .kattis-cta .cta-arrow { display: none; }
}

footer.sb-footer {
  border-top: 1px solid var(--sb-border);
  color: var(--sb-muted);
  font-size: 0.9rem;
  padding: 2rem 0;
  margin-top: 3rem;
}
footer.sb-footer a { color: var(--sb-muted); }
footer.sb-footer a:hover { color: var(--sb-text); }

/* --- QR ------------------------------------------------------------------ */
.qr-frame {
  background: #fff; border-radius: 1rem; padding: 0.9rem; display: inline-block; line-height: 0;
}
.qr-frame svg { width: 100%; height: auto; }
.join-code {
  font-family: var(--bs-font-monospace); font-weight: 700; letter-spacing: 0.25em; color: var(--sb-accent);
}

/* --- Projector view ------------------------------------------------------ */
body.projector { background: #05070d; font-size: 1.25rem; }
body.projector .board td, body.projector .board th { padding: 0.55rem 0.9rem; }
body.projector .board .score { font-size: 1.6rem; color: #fff; }
body.projector .board .name { font-size: 1.35rem; color: #fff; font-weight: 500; }
body.projector .countdown { font-size: 3.5rem; color: #fff; }
body.projector .join-code { font-size: 2.6rem; }
.projector-grid { display: grid; grid-template-columns: minmax(280px, 26%) 1fr; gap: 2rem; padding: 1.5rem 2rem; min-height: 100vh; }
@media (max-width: 900px) { .projector-grid { grid-template-columns: 1fr; } }

/* --- Staff --------------------------------------------------------------- */
.staff-bar { background: #1d1606; border-bottom: 1px solid #4a3812; font-size: 0.85rem; }
.staff-bar a { color: var(--sb-accent); }
.editor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }
@media (max-width: 1100px) { .editor-grid { grid-template-columns: 1fr; } }
.md-editor { font-family: var(--bs-font-monospace); font-size: 0.92rem; min-height: 26rem; line-height: 1.55; }
.preview-pane { position: sticky; top: 5rem; max-height: calc(100vh - 6rem); overflow: auto; }
.formset-row { background: var(--sb-surface-2); border: 1px solid var(--sb-border); border-radius: 0.7rem; padding: 0.9rem; margin-bottom: 0.8rem; }
.dl-inline dt { color: var(--sb-muted); font-weight: 400; }
.nav-tabs { --bs-nav-tabs-border-color: var(--sb-border); --bs-nav-tabs-link-active-bg: var(--sb-surface); --bs-nav-tabs-link-active-border-color: var(--sb-border) var(--sb-border) var(--sb-surface); --bs-nav-tabs-link-active-color: var(--sb-text); }
.nav-tabs .nav-link { color: var(--sb-muted); }
.list-group { --bs-list-group-bg: var(--sb-surface); --bs-list-group-border-color: var(--sb-border); --bs-list-group-action-hover-bg: var(--sb-surface-2); --bs-list-group-color: var(--sb-text); --bs-list-group-action-color: var(--sb-text); }
.modal { --bs-modal-bg: var(--sb-surface); --bs-modal-border-color: var(--sb-border); }
.dropdown-menu { --bs-dropdown-bg: var(--sb-surface-2); --bs-dropdown-border-color: var(--sb-border); --bs-dropdown-link-hover-bg: var(--sb-surface-3); --bs-dropdown-link-active-bg: var(--sb-accent); --bs-dropdown-link-active-color: var(--sb-accent-ink); }

.empty-state { text-align: center; padding: 3rem 1rem; color: var(--sb-muted); border: 1px dashed var(--sb-border); border-radius: 0.9rem; }
.password-reveal { font-family: var(--bs-font-monospace); font-size: 1.3rem; color: var(--sb-accent); user-select: all; }