/* ---------- severity / difficulty levels ---------- */
:root { --lv-critical: #ff3b5c; --lv-high: #ff8a3d; --lv-medium: #ffd23d; --lv-low: #3ddc84; --lv-none: #8ea2c0; }
:root[data-theme="light"] { --lv-critical: #d4002a; --lv-high: #d9600b; --lv-medium: #a87f00; --lv-low: #138a4b; --lv-none: #55667f; }
.lv { display: inline-flex; align-items: center; gap: 5px; font: 700 .78rem var(--mono); padding: 2px 9px; border-radius: 999px;
  border: 1px solid currentColor; white-space: nowrap; }
.lv::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.lv-critical { color: var(--lv-critical); background: color-mix(in srgb, var(--lv-critical) 12%, transparent); }
.lv-high { color: var(--lv-high); background: color-mix(in srgb, var(--lv-high) 12%, transparent); }
.lv-medium { color: var(--lv-medium); background: color-mix(in srgb, var(--lv-medium) 12%, transparent); }
.lv-low { color: var(--lv-low); background: color-mix(in srgb, var(--lv-low) 12%, transparent); }
.lv-none { color: var(--lv-none); }
.bar-left { border-left: 4px solid var(--lv-none) !important; }
.bar-left.lv-critical { border-left-color: var(--lv-critical) !important; }
.bar-left.lv-high { border-left-color: var(--lv-high) !important; }
.bar-left.lv-medium { border-left-color: var(--lv-medium) !important; }
.bar-left.lv-low { border-left-color: var(--lv-low) !important; }
.card.bar-left, li.bar-left { color: var(--text); background: var(--surface); }
.legend { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; font-size: .85rem; color: var(--muted); }

/* ---------- category colors ---------- */
.cat-web { --cat: #3d9be9; } .cat-pwn { --cat: #ff5c7a; } .cat-crypto { --cat: #b48cff; } .cat-reverse { --cat: #ff9f43; }
.cat-forensics { --cat: #2ed3b7; } .cat-osint { --cat: #7bd88f; } .cat-misc { --cat: #c0c8d6; } .cat-hardware { --cat: #f7c948; }
.cat-prompt-security { --cat: #ff7ae0; }
:root[data-theme="light"] .cat-misc { --cat: #55667f; } :root[data-theme="light"] .cat-hardware { --cat: #a87f00; }
:root[data-theme="light"] .cat-osint { --cat: #138a4b; }
.chip.catc { color: var(--cat); border-color: color-mix(in srgb, var(--cat) 45%, transparent); background: color-mix(in srgb, var(--cat) 10%, transparent); }
.cat-head { display: flex; align-items: center; gap: 10px; margin: 26px 0 12px; }
.cat-head h2 { margin: 0; color: var(--cat); }
.cat-head h2::before { content: "> "; color: var(--muted); }

/* ---------- challenges ---------- */
.chall-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.folder-tag { display: inline-flex; align-items: center; gap: 5px; max-width: 100%; padding: 2px 9px; border-radius: 999px;
  font: 600 .72rem var(--mono); color: var(--primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  background: color-mix(in srgb, var(--primary) 12%, transparent); border: 1px solid color-mix(in srgb, var(--primary) 35%, transparent); }
.folder-tag::before { content: ""; width: 10px; height: 8px; flex: none; border-radius: 1px 2px 2px 2px; background: currentColor;
  clip-path: polygon(0 0, 40% 0, 50% 20%, 100% 20%, 100% 100%, 0 100%); }
.chall { display: flex; flex-direction: column; gap: 8px; padding: 16px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); position: relative; transition: transform .15s, border-color .15s; }
.chall:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--cat, var(--primary)); }
.chall h3 { margin: 0; font-size: 1.05rem; padding-right: 70px; }
.chall .pts { font: 700 1.5rem var(--mono); color: var(--cat, var(--primary)); }
.chall.solved { border-color: color-mix(in srgb, var(--green) 50%, transparent); background: color-mix(in srgb, var(--green) 6%, var(--surface)); }
.chall.solved::after { content: "✔ SOLVED"; position: absolute; top: 14px; right: 12px; font: 700 .72rem var(--mono); color: var(--green); }
.flag-form { display: flex; gap: 10px; flex-wrap: wrap; }
.flag-form input { flex: 1 1 260px; font-family: var(--mono); }
.conn { font-family: var(--mono); background: var(--code-bg); color: #cfe3ff; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border); overflow-x: auto; }
details.hint { border: 1px dashed var(--border); border-radius: 8px; padding: 8px 12px; margin-bottom: 8px; }
details.hint summary { cursor: pointer; color: var(--yellow); font-weight: 600; }
.two-col { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.progress { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--cat, var(--primary)); }

/* ---------- ranking ---------- */
table.data td.num { font-family: var(--mono); font-weight: 700; }
/* metal per place: gold, silver, bronze */
.pod-1, tr.rank-1 { --m1: #ffe27a; --m2: #f5a400; --mg: rgba(255, 196, 0, .45); }
.pod-2, tr.rank-2 { --m1: #ffffff; --m2: #a9b8cc; --mg: rgba(200, 220, 245, .45); }
.pod-3, tr.rank-3 { --m1: #ffb27a; --m2: #c8642e; --mg: rgba(235, 120, 50, .5); }
/* light theme: deeper metals, pale gold and silver vanish on white */
:root[data-theme="light"] .pod-1, :root[data-theme="light"] tr.rank-1 { --m1: #f7c948; --m2: #b07800; --mg: rgba(214, 150, 0, .35); }
:root[data-theme="light"] .pod-2, :root[data-theme="light"] tr.rank-2 { --m1: #c9d4e3; --m2: #5f7391; --mg: rgba(95, 115, 145, .3); }
:root[data-theme="light"] .pod-3, :root[data-theme="light"] tr.rank-3 { --m1: #f0a06a; --m2: #a4481a; --mg: rgba(164, 72, 26, .3); }
tr.rank-1 td, tr.rank-2 td, tr.rank-3 td { background: color-mix(in srgb, var(--m2) 11%, transparent); }
tr.rank-1 td:first-child, tr.rank-2 td:first-child, tr.rank-3 td:first-child { box-shadow: inset 3px 0 0 var(--m2); }
tr.rank-1 a, tr.rank-2 a, tr.rank-3 a { font-weight: 700; }
.rank-badge { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: #1a1205;
  background: radial-gradient(circle at 35% 30%, var(--m1), var(--m2)); box-shadow: 0 0 10px var(--mg); }
/* recent solves: compact rows, the box scrolls instead of growing past the ranking table */
.recent-solves { max-height: 560px; overflow-y: auto; margin-right: -8px; padding-right: 8px; scrollbar-width: thin; }
.recent-solves li { padding: 7px 0; font-size: .9rem; line-height: 1.35; }
.recent-solves .avatar.xs { width: 20px !important; height: 20px !important; font-size: .65rem !important; }
.recent-solves .meta { margin-top: 3px; font-size: .78rem; gap: 8px; }
.rank-search { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 4px 0 18px; }
.rank-search input { flex: 1 1 260px; max-width: 420px; }

.podium { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; align-items: center;
  max-width: 940px; margin: 34px auto 34px; }
.pod-1 { grid-column: 2; } .pod-2 { grid-column: 1; } .pod-3 { grid-column: 3; }
.podium > * { grid-row: 1; }
.pod { position: relative; display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center;
  padding: 30px 20px 22px; border-radius: 14px; overflow: hidden;
  background: radial-gradient(120% 70% at 50% 0, color-mix(in srgb, var(--m2) 30%, transparent), transparent 70%),
    linear-gradient(180deg, color-mix(in srgb, var(--m2) 14%, var(--surface)), var(--surface));
  border: 2px solid color-mix(in srgb, var(--m2) 70%, transparent); box-shadow: 0 10px 34px -10px var(--mg), var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease; }
/* metal band across the top of each card + a medal label */
.pod::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 6px; border-radius: 12px 12px 0 0;
  background: linear-gradient(90deg, var(--m2), var(--m1), var(--m2)); }
.pod-medal { font: 700 .72rem var(--mono); letter-spacing: .12em; text-transform: uppercase; padding: 4px 12px; border-radius: 999px;
  color: #1a1205; background: linear-gradient(180deg, var(--m1), var(--m2)); box-shadow: 0 0 14px var(--mg); }
.pod:hover { transform: translateY(-4px); box-shadow: 0 16px 44px -10px var(--mg), var(--shadow); }
/* the winner's card is taller and wider, so it reaches above and below the other two */
.pod-1 { padding: 46px 22px 30px; margin: -28px -8px; z-index: 1; overflow: visible;
  border-color: color-mix(in srgb, var(--m2) 75%, transparent); box-shadow: 0 0 0 1px var(--mg), 0 18px 60px -10px var(--mg), var(--shadow); }
.pod .pod-av .avatar { width: 112px; height: 112px; font-size: 2.4rem; border: 3px solid var(--m2);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--m1) 25%, transparent), 0 0 26px var(--mg); }
.pod-1 .pod-av .avatar { width: 140px; height: 140px; font-size: 3rem; }
.pod-name { font-size: 1.25rem; font-weight: 700; color: var(--text); overflow-wrap: anywhere; }
.pod-1 .pod-name { font-size: 1.5rem; }
.pod-score { font-size: 1.05rem; font-weight: 700; color: var(--m2); }
.pod-1 .pod-score { font-size: 1.25rem; }
.pod-score small { font-size: .75rem; color: var(--muted); font-weight: 400; }
.pod-info { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; margin-top: 4px; }
.pod-info span { display: block; font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.pod-info b { display: block; margin-top: 2px; font-size: .95rem; overflow-wrap: anywhere; }
.pod-bar { position: relative; width: 100%; height: 12px; margin-top: 8px; border-radius: 999px; overflow: hidden;
  background: color-mix(in srgb, var(--text) 14%, transparent); }
.pod-bar i { position: absolute; inset: 0 auto 0 0; border-radius: inherit; background: linear-gradient(90deg, var(--m2), var(--m1)); }
.pod-bar em { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font: 700 .62rem var(--mono); font-style: normal;
  color: var(--text); text-shadow: 0 0 3px var(--bg); }
.pod-rank { font-size: 3rem; font-weight: 800; line-height: 1; margin-top: 6px;
  background: linear-gradient(180deg, var(--m1), var(--m2)); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 2px 10px var(--mg)); }
.pod-1 .pod-rank { font-size: 4rem; }
.crown { position: absolute; top: -26px; left: 50%; width: 56px; transform: translateX(-50%) rotate(-6deg);
  fill: var(--m2); filter: drop-shadow(0 0 8px var(--mg));
  animation: crown-bob 3s ease-in-out infinite, crown-blink 1.4s ease-in-out infinite; }
.crown path { fill: var(--m1); stroke: var(--m2); stroke-width: 2; stroke-linejoin: round; }
@keyframes crown-bob { 50% { transform: translateX(-50%) translateY(-4px) rotate(-6deg); } }
/* the crown flashes: bright gold burst, then back to a soft glow */
@keyframes crown-blink {
  0%, 100% { filter: drop-shadow(0 0 6px var(--mg)) brightness(1); }
  45% { filter: drop-shadow(0 0 4px var(--mg)) brightness(.85); }
  55% { filter: drop-shadow(0 0 18px #ffd84a) drop-shadow(0 0 32px rgba(255, 200, 0, .7)) brightness(1.45); }
}
.crown-wrap { position: absolute; top: -26px; left: 50%; width: 56px; height: 36px; transform: translateX(-50%); pointer-events: none; }
.crown-wrap i { position: absolute; width: 6px; height: 6px; background: #fff6c8; clip-path: polygon(50% 0, 62% 38%, 100% 50%, 62% 62%, 50% 100%, 38% 62%, 0 50%, 38% 38%);
  opacity: 0; animation: sparkle 1.4s ease-in-out infinite; }
.crown-wrap i:nth-child(1) { left: -8px; top: 6px; }
.crown-wrap i:nth-child(2) { right: -8px; top: 2px; animation-delay: .45s; }
.crown-wrap i:nth-child(3) { left: 50%; top: -12px; animation-delay: .9s; }
@keyframes sparkle { 0%, 100% { opacity: 0; transform: scale(.3) rotate(0); } 50% { opacity: 1; transform: scale(1.6) rotate(45deg); } }
@media (prefers-reduced-motion: reduce) { .crown, .crown-wrap i { animation: none; } .pod, .pod:hover { transition: none; transform: none; } }

/* ---------- community ---------- */
.feed { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; font: 700 1rem var(--mono);
  color: #04121f; background: linear-gradient(135deg, var(--primary), var(--red)); flex: none; }
.avatar.sm { width: 28px; height: 28px; font-size: .8rem; }
.who { display: flex; gap: 10px; align-items: center; }
.who a { color: var(--text); font-weight: 600; }
.feed-actions { display: flex; gap: 6px; align-items: center; border-top: 1px solid var(--border); margin-top: 12px; padding-top: 8px; flex-wrap: wrap; }
.btn.ghost { background: none; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { color: var(--text); border-color: transparent; }
.btn.ghost.on { color: var(--red); }
.comments { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.comment { background: var(--surface-2); border-radius: 10px; padding: 8px 12px; font-size: .95rem; }
.comment .meta { margin-bottom: 2px; }
.comment p { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.comment-form { display: flex; gap: 8px; margin-top: 8px; }
.comment-form input { flex: 1; }
textarea.composer { min-height: 110px; resize: vertical; }
.inline-btn { background: none; border: 0; color: var(--muted); cursor: pointer; font: inherit; font-size: .8rem; padding: 0; }
.inline-btn:hover { color: var(--red); }

/* ---------- calendar ---------- */
.view-switch { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.view-switch a { padding: 7px 18px; color: var(--muted); font-weight: 600; }
.view-switch a.on { background: var(--primary); color: var(--primary-ink); }
.view-switch a:hover { text-decoration: none; }
.cal-nav { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 16px 0; }
.cal-nav h2 { margin: 0; min-width: 230px; }
.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; }
.cal .dow { text-align: center; font: 700 .8rem var(--mono); color: var(--muted); padding: 4px 0; }
.cal .day { min-height: 112px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 6px; overflow: hidden; }
.cal .day.out { opacity: .4; }
.cal .day.today { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.cal .num { font: 700 .82rem var(--mono); color: var(--muted); }
.cal .ev { display: block; font-size: .76rem; line-height: 1.3; padding: 3px 6px; margin-top: 4px; border-radius: 5px; color: var(--text);
  background: var(--surface-2); border-left: 3px solid var(--primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cal .ev.vn { border-left-color: var(--red); }
.cal .ev:hover { text-decoration: none; filter: brightness(1.15); }
.week-day { display: grid; grid-template-columns: 110px 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px dashed var(--border); }
.week-day:last-child { border-bottom: 0; }
.week-day .d { font: 700 .95rem var(--mono); color: var(--muted); }
.week-day .d.today { color: var(--primary); }
.year-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.year-grid .card h3 a { color: var(--text); }
.year-grid ul { list-style: none; margin: 0; padding: 0; font-size: .88rem; }
.year-grid li { padding: 4px 0; border-bottom: 1px dashed var(--border); display: flex; gap: 8px; }
.year-grid li:last-child { border-bottom: 0; }
.year-grid li .when { color: var(--muted); font-family: var(--mono); white-space: nowrap; }
.flag-vn { color: var(--red); font-weight: 700; }

/* ---------- misc ---------- */
.form-card.wide { max-width: 680px; }
.help { font-size: .82rem; color: var(--muted); margin-top: 4px; }
.check { display: flex; gap: 8px; align-items: center; margin-top: 14px; color: var(--text); font-size: .95rem; }
.check input { width: auto; }
input[type=email], input[type=number], input[type=url], input[type=datetime-local], input[type=date], input[type=file] {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; }
.dropdown { position: relative; }
.dropdown > button { background: none; border: 0; color: var(--text); font: 600 .95rem var(--sans); cursor: pointer; padding: 7px 10px; border-radius: 8px; }
.dropdown > button:hover { background: var(--surface-2); }
.dropdown .menu { display: none; position: absolute; right: 0; top: 100%; min-width: 210px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: var(--shadow); padding: 6px; z-index: 20; }
.dropdown.open .menu { display: block; }
.dropdown .menu a, .dropdown .menu button { display: block; width: 100%; text-align: left; padding: 8px 10px; border-radius: 6px; color: var(--text);
  background: none; border: 0; font: inherit; cursor: pointer; }
.dropdown .menu a:hover, .dropdown .menu button:hover { background: var(--surface-2); text-decoration: none; }
.warn { border: 1px solid color-mix(in srgb, var(--lv-high) 50%, transparent); background: color-mix(in srgb, var(--lv-high) 8%, transparent);
  color: var(--text); border-radius: 8px; padding: 10px 14px; font-size: .92rem; margin-bottom: 16px; }
.score-box { font: 700 1.05rem var(--mono); }
.desc-clamp { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; color: var(--muted); font-size: .92rem; margin: 4px 0 0; }

@media (max-width: 1180px) {
  .menu-toggle { display: inline-block; margin-left: auto; }
  .nav { display: none; position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--surface); border-bottom: 1px solid var(--border); padding: 10px 16px; max-height: calc(100vh - 62px); overflow-y: auto; }
  .nav.open { display: flex; }
  .dropdown .menu { position: static; display: block; box-shadow: none; border: 0; padding: 0 0 0 10px; }
  .dropdown > button { display: none; }
}
@media (max-width: 860px) {
  .two-col { grid-template-columns: 1fr; }
  .cal { display: none; }
  .podium { grid-template-columns: 1fr; gap: 18px; max-width: 420px; margin-top: 30px; }
  .pod-1, .pod-2, .pod-3 { grid-column: auto; grid-row: auto; }
  .pod-1 { margin: 0; }
  .week-day { grid-template-columns: 1fr; gap: 4px; }
}
@media (min-width: 861px) { .mobile-only { display: none; } }

/* avatars */
img.avatar { object-fit: cover; background: var(--surface-2); padding: 0; }
.avatar.xs { width: 24px; height: 24px; font-size: .7rem; }
.avatar.lg { width: 84px; height: 84px; font-size: 2rem; }
.avatar-edit { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.avatar-link { display: inline-flex; border-radius: 50%; flex: none; }
.avatar-link:hover .avatar { outline: 2px solid var(--primary); outline-offset: 1px; }

/* ---------- news ---------- */
.src-0 { --src: #3d9be9; } .src-1 { --src: #ff5c7a; } .src-2 { --src: #2ed3b7; } .src-3 { --src: #ff9f43; }
.src-4 { --src: #b48cff; } .src-5 { --src: #f7c948; } .src-6 { --src: #7bd88f; } .src-7 { --src: #ff7ae0; }
.t-ransomware { --t: #ff3b5c; } .t-vuln { --t: #ff8a3d; } .t-breach { --t: #b48cff; } .t-scam { --t: #ffd23d; }
.t-malware { --t: #ff7ae0; } .t-apt { --t: #3d9be9; } .t-ai { --t: #2ed3b7; }
:root[data-theme="light"] .t-scam { --t: #a87f00; } :root[data-theme="light"] .src-5 { --src: #a87f00; }

.region-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0 12px; }
.region-tabs a { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 12px; font-weight: 700;
  color: var(--text); background: var(--surface); border: 1px solid var(--border); }
.region-tabs a b { font: 700 .8rem var(--mono); padding: 1px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); }
.region-tabs a:hover { text-decoration: none; border-color: var(--primary); }
.region-tabs a.on { background: linear-gradient(135deg, var(--brand), var(--primary)); color: #fff; border-color: transparent; }
.region-tabs a.vn.on { background: linear-gradient(135deg, #da251d, #ff6a3d); }
.region-tabs a.on b { background: rgba(255, 255, 255, .22); color: #fff; }
.topic-bar { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.topic-bar .topic, .topic-bar .src { padding: 4px 12px; border-radius: 999px; font-size: .82rem; font-weight: 600; }
.topic-bar.sources { margin-bottom: 20px; }
.topic-bar small { opacity: .7; font-family: var(--mono); }
.topic { color: var(--t, var(--muted)); border: 1px solid color-mix(in srgb, var(--t, var(--border)) 50%, transparent);
  background: color-mix(in srgb, var(--t, transparent) 12%, transparent); font: 700 .74rem var(--sans); padding: 2px 9px; border-radius: 999px; }
a.topic:hover, a.src:hover { text-decoration: none; filter: brightness(1.15); }
.topic.on { background: var(--t, var(--primary)); color: #0b1220; border-color: transparent; }
.src { color: var(--src); font-weight: 700; }
.topic-bar .src { border: 1px solid color-mix(in srgb, var(--src) 45%, transparent); background: color-mix(in srgb, var(--src) 10%, transparent); }
.topic-bar .src.on { background: var(--src); color: #0b1220; }

.news-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); margin-top: 16px; }
.news-stack { display: flex; flex-direction: column; gap: 12px; }
.news-card { display: flex; flex-direction: column; border-radius: 14px; overflow: hidden; background: var(--surface);
  border: 1px solid var(--border); color: var(--text); transition: transform .15s, border-color .15s, box-shadow .15s; }
.news-card:hover { text-decoration: none; transform: translateY(-3px); border-color: var(--src, var(--primary)); box-shadow: var(--shadow); }
.news-card.vn { border-top: 3px solid #da251d; }
.news-card.world { border-top: 3px solid var(--primary); }
.news-card .thumb { position: relative; aspect-ratio: 16 / 9; background: linear-gradient(135deg, color-mix(in srgb, var(--src) 45%, #0b1220), #0b1220);
  display: grid; place-items: center; overflow: hidden; }
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.news-card:hover .thumb img { transform: scale(1.04); }
.news-card .thumb > span:first-child { font: 700 3rem var(--mono); color: rgba(255, 255, 255, .85); }
.news-card .region-flag { position: absolute; top: 8px; left: 8px; font-size: 1rem; background: rgba(0, 0, 0, .55);
  padding: 2px 7px; border-radius: 8px; }
.news-card .body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 6px; }
.news-card h3 { font: 700 1.02rem/1.4 var(--sans); margin: 0; }
.news-card p { margin: 0; color: var(--muted); font-size: .9rem; }
.news-card.big { flex-direction: row; min-height: 280px; }
.news-card.big .thumb { flex: 1.3; aspect-ratio: auto; min-height: 260px; }
.news-card.big .body { flex: 1; padding: 22px 24px; justify-content: center; }
.news-card.big h3 { font-size: 1.5rem; }
.news-card.big p { font-size: 1rem; }
.news-stack .news-card { flex-direction: row; }
.news-stack .news-card .thumb { width: 150px; flex: none; aspect-ratio: auto; }
.news-stack .news-card .thumb > span:first-child { font-size: 1.8rem; }
.news-stack .news-card h3 { font-size: .95rem; }
.club-news { border-left: 4px solid var(--red); }
@media (max-width: 860px) {
  .news-card.big { flex-direction: column; }
  .news-card.big .thumb { min-height: 190px; }
  .news-card.big h3 { font-size: 1.2rem; }
  .news-stack .news-card .thumb { width: 110px; }
}

/* ---------- nav group ---------- */
.nav-group > button { color: var(--muted); font-weight: 500; font-size: .95rem; }
.nav-group > button.active, .nav-group > button:hover { color: var(--text); background: var(--surface-2); }
.nav-group .menu { left: 0; right: auto; }

/* ---------- careers ---------- */
.role-index { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 22px; }
.role-index a { padding: 6px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .9rem; }
.role-index a:hover { border-color: var(--primary); text-decoration: none; }
.role-list { display: flex; flex-direction: column; gap: 18px; }
.role { scroll-margin-top: 80px; border-top: 3px solid var(--primary); }
.role:nth-child(3n+2) { border-top-color: var(--red); } .role:nth-child(3n) { border-top-color: var(--lv-medium); }
.role header { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }
.role header h2 { margin: 0 0 4px; }
.role header p { margin: 0; color: var(--muted); }
.role-icon { font-size: 2.2rem; line-height: 1; }
.role-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.role-grid h3 { font-size: .95rem; margin: 0 0 6px; }
.role-grid ul { margin: 0; padding-left: 18px; color: var(--text); font-size: .93rem; }
.role-grid li { margin-bottom: 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.city-hcm.on { background: linear-gradient(135deg, #006bb3, #3d9be9) !important; }
.city-hn.on { background: linear-gradient(135deg, #da251d, #ff6a3d) !important; }
.city-dn.on { background: linear-gradient(135deg, #0f9b6e, #2ed3b7) !important; }
.job { border-left: 4px solid var(--primary); }

.site-notice { background: linear-gradient(90deg, var(--brand), var(--red)); color: #fff; font-weight: 600; font-size: .93rem; padding: 8px 0; }

.profile-post { padding: 12px 0; border-bottom: 1px dashed var(--border); }
.profile-post:last-of-type { border-bottom: 0; }
.profile-post .md { margin-top: 6px; font-size: .97rem; }

/* footer */
footer .footer-grid { display: grid; grid-template-columns: 1.2fr 1.4fr 1fr; gap: 24px; align-items: start; }
footer h4 { margin: 0 0 10px; font: 700 .85rem var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.socials { display: flex; flex-wrap: wrap; gap: 10px; }
.social { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 10px; font-weight: 700; color: #fff; }
.social svg { width: 20px; height: 20px; }
.social:hover { text-decoration: none; filter: brightness(1.1); transform: translateY(-1px); }
.social.fb { background: #1877f2; }
.social.zalo { background: #0068ff; }
.social.discord { background: #5865f2; }
.social.soon { background: var(--surface-2); color: var(--muted); border: 1px dashed var(--border); cursor: default; }
@media (max-width: 860px) { footer .footer-grid { grid-template-columns: 1fr; } }

/* ---------- top bar: keep brand and items on one line ---------- */
.topbar .brand { flex: none; white-space: nowrap; margin-right: 10px; }
.topbar .brand > span { line-height: 1.15; }
.nav { gap: 2px; flex-wrap: nowrap; }
.nav > a, .nav-group > button { white-space: nowrap; padding: 7px 9px; font-size: .92rem; }
.nav-group > button { display: inline-flex; align-items: center; gap: 4px; }
@media (max-width: 1440px) { .topbar .brand small { display: none; } }
@media (max-width: 1300px) {
  .menu-toggle { display: inline-block; margin-left: auto; }
  .nav { display: none; position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--surface); border-bottom: 1px solid var(--border); padding: 10px 16px; max-height: calc(100vh - 62px); overflow-y: auto; }
  .nav.open { display: flex; }
  .nav-group .menu { position: static; display: block; box-shadow: none; border: 0; padding: 0 0 0 12px; }
  .nav-group > button { display: none; }
}

/* studio: challenge folders manager */
.folder-mgr { display: flex; flex-direction: column; gap: 8px; }
.folder-add { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(180px, 1.4fr) auto; gap: 8px; align-items: center;
  padding-bottom: 12px; margin-bottom: 4px; border-bottom: 1px solid var(--border); }
.folder-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); }
.folder-row.on { background: color-mix(in srgb, var(--primary) 10%, transparent); border-color: color-mix(in srgb, var(--primary) 45%, transparent); }
.folder-row .view { flex: 1 1 220px; min-width: 0; overflow-wrap: anywhere; }
.folder-row .edit { flex: 1 1 360px; display: flex; flex-wrap: wrap; gap: 8px; }
.folder-row [hidden] { display: none !important; }
.folder-row .edit input { flex: 1 1 160px; margin: 0; }
.folder-row .acts { display: flex; flex-wrap: wrap; gap: 6px; margin-left: auto; }
.folder-row.none { border-style: dashed; }
.folder-row.none .view { flex: 1; }
.folder-row .order { display: flex; gap: 2px; }
.folder-row .order button[disabled] { opacity: .3; cursor: default; }
.folder-row .count { min-width: 64px; justify-content: center; }
.folder-add input { margin: 0; }
@media (max-width: 760px) {
  .folder-add { grid-template-columns: 1fr; }
}