/* THE COBALT FILES — P4K9 chrome, cobalt investigation theme. */
:root {
  --ink: #1d1d1f;
  --ink-2: #424245;
  --muted: #7a7a80;
  --bg: #f5f5f7;
  --card: #ffffff;
  --line: #d9d9df;
  --line-2: #e8e8ee;
  --blue: #0071e3;
  --blue-dark: #0060c0;
  --navy: #080d1c;
  --navy-2: #0e1730;
  --cobalt: #2f6bff;
  --cyan: #3ad0ff;
  --gold: #f0b429;
  --green: #1f9d63;
  --red: #d93a3f;
  --bronze: #b87333;
  --silver: #8b95a5;
  --radius: 18px;
  --shadow: 0 18px 40px rgba(8, 13, 28, 0.1);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
code, pre { font-family: var(--mono); }
code {
  font-size: 0.88em;
  background: rgba(47, 107, 255, 0.09);
  color: #1c3f9e;
  padding: 0.12em 0.38em;
  border-radius: 5px;
  white-space: nowrap;
}
pre code { background: none; color: inherit; padding: 0; white-space: inherit; font-size: inherit; }
h1, h2, h3 { letter-spacing: -0.02em; line-height: 1.15; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.inline { display: inline; }

/* ---------------- Nav ---------------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 22px; height: 54px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--ink); font-weight: 700; font-size: 16px; }
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 24px; height: 24px; border-radius: 7px; background: var(--navy);
  color: var(--cyan); font-size: 11px; font-weight: 800; display: grid; place-items: center;
  letter-spacing: 0.3px;
}
.brand-sep { width: 1px; height: 18px; background: var(--line); }
.brand-course { font-size: 12px; letter-spacing: 1.6px; text-transform: uppercase; color: var(--muted); font-weight: 600; }
nav.links { display: flex; gap: 20px; margin-left: 10px; font-size: 13px; }
nav.links a { color: var(--ink-2); }
nav.links a:hover { color: var(--ink); text-decoration: none; }
nav.links a.on { color: var(--ink); font-weight: 600; }
.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--ink-2);
  border: 1px solid var(--line); border-radius: 980px; padding: 6px 12px; background: #fff;
}
.chip:hover { text-decoration: none; border-color: var(--ink-2); }
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px rgba(31,157,99,0.16); }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 980px; font-size: 14px; font-weight: 600;
  background: var(--blue); color: #fff; border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: background 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
  font-family: inherit; line-height: 1.3;
}
.btn:hover { background: var(--blue-dark); text-decoration: none; transform: translateY(-1px); }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { background: #f2f2f5; }
.btn.light { background: #fff; color: var(--navy); }
.btn.light:hover { background: #e9edff; }
.btn.ghost.light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.45); }
.btn.ghost.light:hover { background: rgba(255,255,255,0.12); }
.btn.lg { padding: 14px 26px; font-size: 16px; }
.btn.sm { padding: 7px 14px; font-size: 12.5px; }
.btn.full { width: 100%; }
.btn.danger { background: var(--red); }
.btn.danger:hover { background: #b92c31; }

/* ---------------- Flash / pills ---------------- */
.flash {
  border-radius: 12px; padding: 12px 16px; font-size: 14px; margin: 0 0 22px;
  border: 1px solid transparent;
}
.flash.good { background: #eaf8f1; border-color: #bfe8d4; color: #12603c; }
.flash.bad { background: #fdeeee; border-color: #f3c6c7; color: #8c2427; }
.pill {
  display: inline-flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 700;
  letter-spacing: 0.5px; text-transform: uppercase; color: var(--ink-2);
  background: var(--bg); border: 1px solid var(--line); padding: 4px 9px; border-radius: 999px;
}
.pill.sm { font-size: 10px; padding: 3px 7px; }
.pill.good { background: #eaf8f1; border-color: #bfe8d4; color: #12603c; }
.pill.tier-gold { background: #fdf5df; border-color: #eed69a; color: #7a5a06; }
.pill.tier-silver { background: #f1f3f6; border-color: #d8dde5; color: #4b5563; }
.pill.tier-bronze { background: #fbf1e8; border-color: #e8cdb5; color: #7a4a1d; }

/* ---------------- Landing ---------------- */
.hero {
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(47, 107, 255, 0.5), transparent 60%),
    radial-gradient(700px 400px at 10% 110%, rgba(58, 208, 255, 0.18), transparent 60%),
    linear-gradient(150deg, #060a16 0%, #0a1230 55%, #0b1a44 100%);
  color: #fff;
  overflow: hidden;
  position: relative;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 20%, transparent 100%);
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 56px; align-items: center;
  padding-top: 84px; padding-bottom: 92px;
}
.eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: 1.8px; text-transform: uppercase;
  color: var(--blue); margin-bottom: 12px;
}
.eyebrow.light { color: var(--cyan); }
.hero h1 { font-size: 62px; font-weight: 800; letter-spacing: -2.4px; line-height: 1.02; margin-bottom: 20px; }
.hero h1 span {
  background: linear-gradient(100deg, #6ea8ff, #3ad0ff 70%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: 18px; color: rgba(255,255,255,0.78); max-width: 560px; margin-bottom: 28px; }
.hero-lead code { background: rgba(58,208,255,0.14); color: #a9e6ff; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.hero-note { font-size: 13px; color: rgba(255,255,255,0.5); }

.hero-panel {
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(8, 15, 34, 0.78);
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.08);
  overflow: hidden;
  backdrop-filter: blur(8px);
}
.panel-head {
  display: flex; align-items: center; gap: 8px; font-size: 10.5px; letter-spacing: 1.4px;
  color: rgba(255,255,255,0.55); padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.1);
}
.live { width: 7px; height: 7px; border-radius: 50%; background: #38d17d; box-shadow: 0 0 0 3px rgba(56,209,125,0.2); }
.terminal {
  padding: 20px; font-size: 12.5px; line-height: 1.75; color: #d7e3ff; overflow-x: auto;
}
.terminal.small { font-size: 12px; }
.t-dim { color: #6c7ba6; }
.t-key { color: #7cb2ff; }
.t-fn { color: #5fe0c0; }
.t-str { color: #ffcf7a; }
.t-bad { color: #ff8a8f; }
.panel-foot {
  display: flex; gap: 18px; padding: 12px 18px; font-size: 11px; color: rgba(255,255,255,0.5);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.strip { background: #fff; border-bottom: 1px solid var(--line); }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-top: 26px; padding-bottom: 26px; }
.strip-grid div { display: flex; align-items: baseline; gap: 9px; }
.strip-grid strong { font-size: 26px; letter-spacing: -1px; }
.strip-grid span { font-size: 13px; color: var(--muted); }

.section { padding: 86px 0; }
.section.tight { padding: 54px 0; }
.section.dark { background: var(--navy); color: #fff; }
.section h2 { font-size: 38px; font-weight: 700; letter-spacing: -1.2px; margin-bottom: 14px; }
.section h2.light { color: #fff; }
.section .lead { font-size: 18px; color: var(--ink-2); max-width: 720px; margin-bottom: 36px; }
.section.dark .lead { color: rgba(255,255,255,0.7); }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-head h2 { margin: 0; font-size: 28px; }
.text-link { font-size: 13px; font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--ink-2); }
.ico {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  font-size: 13px; font-weight: 800; margin-bottom: 18px;
}
.ico.blue { background: #e8f1ff; color: #0a5bd0; }
.ico.cyan { background: #e4f9ff; color: #087f9e; }
.ico.gold { background: #fdf4da; color: #8a6206; }

.acts-list { display: flex; flex-direction: column; gap: 2px; margin-top: 30px; }
.act-row {
  display: grid; grid-template-columns: 90px 1fr auto; gap: 22px; align-items: start;
  padding: 22px 0; border-top: 1px solid rgba(255,255,255,0.12);
}
.act-row:last-child { border-bottom: 1px solid rgba(255,255,255,0.12); }
.act-badge {
  font-size: 10px; letter-spacing: 1.4px; font-weight: 700; color: var(--cyan);
  border: 1px solid rgba(58,208,255,0.4); border-radius: 6px; padding: 4px 8px; text-align: center;
}
.act-body h3 { font-size: 20px; color: #fff; margin-bottom: 4px; }
.act-body p { font-size: 14px; color: rgba(255,255,255,0.62); max-width: 620px; }
.act-range { font-size: 12px; color: rgba(255,255,255,0.5); white-space: nowrap; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.two-col.gap { gap: 44px; align-items: start; }
.checks { list-style: none; margin: 0 0 28px; }
.checks li { position: relative; padding-left: 28px; margin-bottom: 10px; font-size: 15px; color: var(--ink-2); }
.checks li::before {
  content: "✓"; position: absolute; left: 0; top: 1px; width: 18px; height: 18px; border-radius: 50%;
  background: #e4f9ff; color: #087f9e; font-size: 11px; font-weight: 800; display: grid; place-items: center;
}
.file-card { background: var(--navy); border-color: #1a2444; padding: 0; overflow: hidden; color: #fff; }
.file-card pre { padding: 20px; font-size: 12.5px; line-height: 1.8; color: #d7e3ff; overflow-x: auto; }
.file-head { display: flex; align-items: center; gap: 8px; font-size: 11px; letter-spacing: 1px; color: rgba(255,255,255,0.55); padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.file-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.file-foot { padding: 14px 20px 20px; font-size: 13px; color: rgba(255,255,255,0.6); border-top: 1px solid rgba(255,255,255,0.08); }

.cta-band { background: #fff; border-top: 1px solid var(--line); }
.cta-band h2 { margin-bottom: 10px; }
.cta-band p { color: var(--muted); margin-bottom: 24px; }

/* ---------------- Dashboard ---------------- */
.briefing {
  background:
    radial-gradient(800px 380px at 80% 0%, rgba(47,107,255,0.38), transparent 60%),
    linear-gradient(160deg, #070c19, #0b1430 70%, #0d1a3d);
  color: #fff; padding: 46px 0 52px;
}
.brief-top { display: flex; justify-content: space-between; gap: 32px; align-items: flex-start; flex-wrap: wrap; }
.brief-id h1 { font-size: 40px; letter-spacing: -1.4px; margin-bottom: 6px; }
.brief-id p { color: rgba(255,255,255,0.62); font-size: 15px; max-width: 440px; }
.brief-stats { display: grid; grid-template-columns: repeat(4, minmax(78px, 1fr)); gap: 10px; }
.stat {
  background: rgba(255,255,255,0.055); border: 1px solid rgba(255,255,255,0.11);
  border-radius: 12px; padding: 12px 14px; min-width: 84px;
}
.stat-n { display: block; font-size: 22px; font-weight: 700; letter-spacing: -0.6px; }
.stat-l { display: block; font-size: 10.5px; color: rgba(255,255,255,0.55); text-transform: uppercase; letter-spacing: 0.7px; }
.xp-row { display: flex; align-items: center; gap: 16px; margin-top: 26px; }
.xpbar { flex: 1; height: 8px; border-radius: 999px; background: rgba(255,255,255,0.14); overflow: hidden; }
.xpbar span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #2f6bff, #3ad0ff); }
.xpbar.small { height: 6px; background: #e9e9ef; }
.xpbar.small span { background: linear-gradient(90deg, var(--cobalt), var(--cyan)); }
.xp-label { font-size: 12px; color: rgba(255,255,255,0.65); white-space: nowrap; }
.side-card .xp-label, .page-day .xp-label { color: var(--muted); }
.continue {
  display: grid; grid-template-columns: 1fr auto; gap: 4px 20px; align-items: center;
  margin-top: 30px; padding: 20px 24px; border-radius: 16px;
  background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.16);
  color: #fff; transition: background 0.18s ease, transform 0.18s ease;
}
.continue:hover { text-decoration: none; background: rgba(255,255,255,0.12); transform: translateY(-2px); }
.continue-tag { grid-column: 1; font-size: 11px; letter-spacing: 1.3px; text-transform: uppercase; color: var(--cyan); font-weight: 700; }
.continue-title { grid-column: 1; font-size: 22px; font-weight: 700; letter-spacing: -0.4px; }
.continue-skill { grid-column: 1; font-size: 13px; color: rgba(255,255,255,0.55); }
.continue-go { grid-column: 2; grid-row: 1 / span 3; font-size: 14px; font-weight: 600; }
.continue.done { grid-template-columns: 1fr auto; }

.acts { display: flex; flex-direction: column; gap: 34px; }
.act-block {}
.act-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.act-num { font-size: 10px; font-weight: 800; letter-spacing: 1.4px; color: var(--blue); background: #e8f1ff; padding: 3px 7px; border-radius: 5px; }
.act-head h3 { font-size: 20px; letter-spacing: -0.4px; }
.act-days { margin-left: auto; font-size: 12px; color: var(--muted); }
.daygrid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.tile {
  position: relative; display: flex; flex-direction: column; gap: 6px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 13px 13px 12px; min-height: 108px; color: var(--ink);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}
.tile:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(8,13,28,0.09); border-color: #b9b9c4; }
.tile-top { display: flex; align-items: center; justify-content: space-between; gap: 4px; }
.tile-num { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.tile-boss { font-size: 8.5px; font-weight: 800; letter-spacing: 0.8px; color: #8c2427; background: #fdeeee; border-radius: 4px; padding: 2px 5px; }
.tile-check { font-size: 12px; color: var(--green); font-weight: 800; }
.tile-title { font-size: 13px; font-weight: 600; line-height: 1.25; letter-spacing: -0.1px; }
.tile-meta { margin-top: auto; font-size: 10.5px; color: var(--muted); }
.tile.done { background: #f0faf5; border-color: #c8e9d8; }
.tile.done .tile-num { color: var(--green); }
.tile.gold { background: linear-gradient(160deg, #fffdf5, #fdf4da); border-color: #ecd79b; }
.tile.gold .tile-meta { color: #8a6206; font-weight: 600; }
.tile.started { border-color: #b9cdfa; }
.tile.next { border-color: var(--cobalt); box-shadow: 0 0 0 2px rgba(47,107,255,0.16); }
.tile.next .tile-meta { color: var(--cobalt); font-weight: 700; }

.badges { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.badges.all { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
.badge {
  display: flex; flex-direction: column; gap: 3px; padding: 13px;
  border: 1px solid var(--line); border-radius: 12px; background: #fff;
}
.badge.earned { border-color: #ecd79b; background: linear-gradient(160deg, #fffdf7, #fdf6e2); }
.badge.locked { opacity: 0.46; }
.badge-icon {
  width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
  background: var(--navy); color: var(--cyan); font-size: 11px; font-weight: 800; margin-bottom: 4px;
}
.badge.earned .badge-icon { background: linear-gradient(140deg, #8a6206, #d9a520); color: #fff; }
.badge-name { font-size: 12.5px; font-weight: 700; }
.badge-desc { font-size: 10.5px; color: var(--muted); line-height: 1.35; }

/* ---------------- Leaderboard ---------------- */
.board { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #fff; }
.board-row {
  display: grid; grid-template-columns: 34px 1.6fr 1.2fr 0.7fr 0.5fr 0.5fr;
  gap: 10px; align-items: center; padding: 11px 14px; font-size: 13px;
  border-top: 1px solid var(--line-2); color: var(--ink);
}
.board-row:first-child { border-top: none; }
.board-row.head { background: #fafafc; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.8px; color: var(--muted); font-weight: 700; }
a.board-row:hover { background: #f7f9ff; text-decoration: none; }
.board-row.me { background: #eef4ff; }
.board-row .rank { font-family: var(--mono); color: var(--muted); }
.board-row .who { display: flex; flex-direction: column; line-height: 1.25; }
.board-row .who small { color: var(--muted); font-size: 11px; }
.board-row .num { text-align: right; font-variant-numeric: tabular-nums; }
.board.compact .board-row { grid-template-columns: 28px 1.5fr 0.6fr 0.6fr; font-size: 12.5px; }
.board.compact .board-row > :nth-child(3), .board.compact .board-row > :nth-child(6) { display: none; }

/* ---------------- Day ---------------- */
.day-head { background: linear-gradient(160deg, #070c19, #0c1633 65%, #10204a); color: #fff; padding: 38px 0 40px; }
.day-head.boss { background: radial-gradient(700px 320px at 80% 0%, rgba(217,58,63,0.34), transparent 60%), linear-gradient(160deg, #120608, #1c0b16 55%, #241029); }
.crumbs { font-size: 12px; color: rgba(255,255,255,0.5); margin-bottom: 16px; }
.crumbs a { color: rgba(255,255,255,0.7); }
.crumbs span { margin: 0 4px; opacity: 0.5; }
.day-title-row { display: flex; justify-content: space-between; gap: 28px; align-items: flex-end; flex-wrap: wrap; }
.day-title-row h1 { font-size: 46px; letter-spacing: -1.8px; margin-bottom: 8px; }
.day-skill { color: rgba(255,255,255,0.66); font-size: 15px; max-width: 620px; }
.day-skill code { background: rgba(58,208,255,0.14); color: #a9e6ff; }
.day-progress { min-width: 210px; }
.dp-n { font-size: 26px; font-weight: 700; letter-spacing: -0.8px; }
.dp-n small { font-size: 12px; font-weight: 500; color: rgba(255,255,255,0.5); margin-left: 4px; }
.dp-bar { height: 6px; border-radius: 999px; background: rgba(255,255,255,0.16); margin: 8px 0 6px; overflow: hidden; }
.dp-bar span { display: block; height: 100%; background: linear-gradient(90deg, #2f6bff, #3ad0ff); }
.dp-l { font-size: 11px; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.8px; }

.day-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 34px; padding-top: 36px; padding-bottom: 70px; align-items: start; }
.block { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; margin-bottom: 18px; }
.block h2 { font-size: 21px; letter-spacing: -0.4px; }
.block-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.block p { font-size: 15px; color: var(--ink-2); }
.block p + p { margin-top: 10px; }
.objectives { list-style: none; margin: 0 0 18px; }
.objectives li { position: relative; padding-left: 24px; margin-bottom: 8px; font-size: 15px; color: var(--ink-2); }
.objectives li::before { content: ""; position: absolute; left: 4px; top: 8px; width: 7px; height: 7px; border-radius: 50%; background: var(--cobalt); }
.livefire { border-left: 3px solid var(--cobalt); padding: 4px 0 4px 18px; margin: 18px 0 20px; }
.lf-label, .trap-label, .cliff-label, .story-label {
  font-size: 10px; font-weight: 800; letter-spacing: 1.4px; text-transform: uppercase; color: var(--cobalt); margin-bottom: 5px;
}
.livefire p { font-size: 15px; color: var(--ink-2); }
.teach { border-left: 3px solid var(--cobalt); }
.teach-body { font-size: 15px; color: var(--ink-2); }
.teach-body p { margin-bottom: 12px; }
.teach-body ul, .teach-body ol { margin: 0 0 14px 20px; }
.teach-body li { margin-bottom: 7px; }
.teach-body code { background: rgba(47,107,255,0.1); color: #1c3f9e; }
.teach pre.code-block { margin: 12px 0 16px; }
.worked-tier { border: 1px solid var(--line); border-radius: 12px; padding: 13px 16px; margin-bottom: 10px; background: #fcfcfe; }
.worked-tier summary { cursor: pointer; font-size: 13.5px; font-weight: 700; color: var(--ink-2); }
.worked-tier[open] summary { margin-bottom: 10px; }
.worked-tier pre.code-block { margin: 0 0 12px; }

.trap {
  background: #fff8ed; border: 1px solid #f2dcb6; border-radius: 14px; padding: 18px 20px; margin: 0 0 18px;
}
.trap-label { color: #9a6408; }
.trap p { font-size: 14.5px; color: #6b4a12; }
.cliff {
  background: #f2f6ff; border: 1px solid #cfdcfb; border-radius: 14px; padding: 18px 20px; margin: 18px 0;
}
.cliff p { font-size: 15px; color: #23386e; font-style: italic; }
.story {
  background: var(--navy); color: #fff; border: none;
  border-radius: var(--radius); padding: 22px 26px; margin-bottom: 18px;
}
.story p { color: rgba(255,255,255,0.82); font-size: 15.5px; }
.story-label { color: var(--cyan); }
.meta-line { font-size: 13px; color: var(--muted); margin: 0 0 16px 4px; }
.tests, .scoring { font-size: 14.5px; color: var(--ink-2); }
.scoring { margin: 12px 0 0 18px; }
.scoring li { margin-bottom: 4px; }
.deliverable { background: var(--bg); border-radius: 12px; padding: 16px 18px; margin-bottom: 16px; }
.deliverable ol { margin-left: 18px; }
.deliverable li { font-size: 14.5px; margin-bottom: 6px; color: var(--ink-2); }

.quests { display: flex; flex-direction: column; gap: 14px; }
.quest { border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; background: #fcfcfe; }
.quest.saved { border-color: #c8e9d8; background: #fbfffd; }
.quest-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 7px; }
.quest-tier { font-size: 11px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; }
.quest-tier.t-bronze { color: #8a5320; }
.quest-tier.t-silver { color: #5c6675; }
.quest-tier.t-gold { color: #8a6206; }
.quest-prompt { font-size: 14.5px; color: var(--ink-2); margin-bottom: 10px; }
.sql-input {
  width: 100%; font-family: var(--mono); font-size: 13px; line-height: 1.6;
  border: 1px solid var(--line); border-radius: 10px; padding: 12px;
  background: #0c1224; color: #d7e3ff; resize: vertical; min-height: 92px;
  caret-color: var(--cyan); tab-size: 2;
}
.sql-input:focus { outline: none; border-color: var(--cobalt); box-shadow: 0 0 0 3px rgba(47,107,255,0.16); }
.sql-input::placeholder { color: #5b6890; }
.quest-actions { display: flex; align-items: center; gap: 12px; margin-top: 10px; flex-wrap: wrap; }
.hint { font-size: 11.5px; color: var(--muted); }

.quiz-form .q { border: none; border-top: 1px solid var(--line-2); padding: 16px 0 4px; }
.quiz-form .q:first-of-type { border-top: none; padding-top: 0; }
.quiz-form legend { display: flex; gap: 10px; font-size: 15px; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
.qnum {
  flex: 0 0 24px; width: 24px; height: 24px; border-radius: 7px; background: var(--navy); color: var(--cyan);
  font-size: 11px; font-weight: 800; display: grid; place-items: center; font-family: var(--mono);
}
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.opt {
  display: flex; gap: 9px; align-items: flex-start; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 10px; font-size: 13.5px; color: var(--ink-2); cursor: pointer; background: #fff;
}
.opt:hover { border-color: #b9cdfa; background: #f8faff; }
.opt input { margin-top: 3px; accent-color: var(--cobalt); }
.opt code { white-space: normal; }
.quiz-actions { display: flex; align-items: center; gap: 14px; margin-top: 18px; flex-wrap: wrap; }
.quiz-result {
  display: flex; align-items: center; gap: 18px; border-radius: 14px; padding: 18px 20px;
  background: #f7f7fa; border: 1px solid var(--line); margin-bottom: 14px;
}
.quiz-result.gold { background: linear-gradient(160deg, #fffdf5, #fdf4da); border-color: #ecd79b; }
.quiz-result.silver { background: #f5f6f9; border-color: #d8dde5; }
.quiz-result.bronze { background: #fbf4ed; border-color: #e8cdb5; }
.qr-score { font-size: 34px; font-weight: 800; letter-spacing: -1.5px; }
.qr-score span { font-size: 16px; color: var(--muted); font-weight: 600; }
.qr-body strong { font-size: 15px; }
.qr-body p { font-size: 13px; color: var(--muted); margin-top: 2px; }
.review { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin-bottom: 12px; }
.review summary { cursor: pointer; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.review-list { list-style: none; margin: 12px 0 0; }
.review-list li { padding: 10px 0; border-top: 1px solid var(--line-2); font-size: 13px; }
.review-list li.ok .ra { color: var(--green); }
.review-list li.no .ra { color: var(--red); }
.rq { font-weight: 600; margin-bottom: 3px; }
.ra, .rc { color: var(--ink-2); }
.rw { color: var(--muted); margin-top: 3px; }
.retake { margin-top: 4px; }

.day-nav { display: flex; justify-content: space-between; gap: 14px; margin-top: 24px; }
.day-nav a {
  display: flex; flex-direction: column; gap: 2px; padding: 14px 18px; border: 1px solid var(--line);
  border-radius: 12px; background: #fff; min-width: 200px; color: var(--ink);
}
.day-nav a:hover { text-decoration: none; border-color: #b9cdfa; }
.day-nav a span { font-size: 11px; color: var(--muted); }
.day-nav a strong { font-size: 14px; }
.day-nav .dn-next { text-align: right; margin-left: auto; }

.day-side { position: sticky; top: 74px; display: flex; flex-direction: column; gap: 14px; }
.side-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.side-head { font-size: 10.5px; font-weight: 800; letter-spacing: 1.3px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.breakdown { list-style: none; margin: 14px 0 0; }
.breakdown li { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); padding: 5px 0; }
.breakdown li.done { color: var(--ink-2); }
.bd-check { width: 14px; color: var(--green); font-weight: 800; }
.breakdown li:not(.done) .bd-check { color: #c4c4cc; }
.bd-xp { margin-left: auto; font-family: var(--mono); font-size: 11px; }
.mini-stat { display: flex; justify-content: space-between; gap: 10px; font-size: 12.5px; padding: 6px 0; border-top: 1px solid var(--line-2); }
.mini-stat:first-of-type { border-top: none; }
.mini-stat span { color: var(--muted); }
.side-card .text-link { display: inline-block; margin-top: 12px; }
.codex {
  border-radius: 14px; padding: 16px; color: #fff; background: #14161d;
  border: 1px solid #2a2d38; position: relative; overflow: hidden;
}
.codex::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(240px 120px at 80% 0%, rgba(58,208,255,0.18), transparent 70%);
}
.codex.unlocked { background: linear-gradient(155deg, #1a1206, #3a2a0a); border-color: #6d5312; }
.codex.unlocked::after { background: radial-gradient(240px 120px at 80% 0%, rgba(240,180,41,0.28), transparent 70%); }
.codex-top { display: flex; justify-content: space-between; font-size: 9.5px; letter-spacing: 1.6px; color: rgba(255,255,255,0.55); font-weight: 700; }
.codex-art { font-size: 40px; text-align: center; padding: 14px 0 10px; color: var(--cyan); }
.codex.unlocked .codex-art { color: var(--gold); }
.codex-name { font-size: 15px; font-weight: 700; text-align: center; letter-spacing: -0.2px; }
.codex-foot { font-size: 10px; text-align: center; color: rgba(255,255,255,0.5); margin-top: 6px; }

/* ---------------- Profile ---------------- */
.profile-head { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; margin-bottom: 28px; }
.avatar {
  width: 74px; height: 74px; border-radius: 22px; display: grid; place-items: center;
  background: linear-gradient(150deg, var(--cobalt), var(--cyan)); color: #fff; font-size: 30px; font-weight: 800;
}
.profile-head h1 { font-size: 38px; letter-spacing: -1.2px; }
.profile-level { margin-left: auto; text-align: right; }
.pl-n { display: block; font-size: 34px; font-weight: 800; letter-spacing: -1.4px; }
.pl-t { display: block; font-size: 13px; color: var(--muted); }
.pl-x { display: block; font-size: 12px; color: var(--blue); font-weight: 600; }
.profile-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 36px; }
.profile-stats div { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.profile-stats strong { display: block; font-size: 22px; letter-spacing: -0.6px; }
.profile-stats span { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.6px; }
h2 + .badges.all { margin-top: 16px; margin-bottom: 28px; }

/* ---------------- Auth / settings / forms ---------------- */
.auth-wrap { display: grid; place-items: center; min-height: 74vh; }
.auth-card {
  width: 100%; max-width: 430px; background: #fff; border: 1px solid var(--line);
  border-radius: 22px; padding: 34px; box-shadow: var(--shadow);
}
.auth-card h1 { font-size: 30px; letter-spacing: -1px; margin-bottom: 6px; }
.auth-card > .muted { margin-bottom: 20px; font-size: 14px; }
.auth-alt { margin-top: 18px; font-size: 13px; color: var(--muted); }
.form { display: flex; flex-direction: column; gap: 14px; }
.form label { display: flex; flex-direction: column; gap: 5px; font-size: 12.5px; font-weight: 600; color: var(--ink-2); }
.form input[type="text"], .form input[type="email"], .form input[type="password"], .form input:not([type]) {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 10px;
  font-family: inherit; font-size: 14px; background: #fff;
}
.form input:focus { outline: none; border-color: var(--cobalt); box-shadow: 0 0 0 3px rgba(47,107,255,0.14); }
.field-note { font-size: 10.5px; font-weight: 400; color: var(--muted); }
.form .check { flex-direction: row; align-items: center; gap: 9px; font-weight: 400; font-size: 13px; }
.form .check input { accent-color: var(--cobalt); }
.danger-zone { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 8px; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.settings-grid h2 { font-size: 20px; margin-bottom: 14px; }
.settings-grid section { padding-bottom: 28px; }

/* ---------------- Certificate ---------------- */
.certificate {
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  padding: 54px 48px; text-align: center; box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.certificate::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 8px;
  background: linear-gradient(90deg, var(--navy), var(--cobalt), var(--cyan));
}
.cert-kicker { font-size: 10.5px; letter-spacing: 2.4px; color: var(--muted); font-weight: 700; margin-bottom: 18px; }
.certificate h1 { font-size: 34px; letter-spacing: -1.2px; margin-bottom: 18px; }
.cert-line { color: var(--ink-2); font-size: 14px; }
.cert-name { font-size: 38px; font-weight: 800; letter-spacing: -1.4px; margin: 12px 0 16px; }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 34px 0 30px; }
.cert-grid div { border-top: 1px solid var(--line); padding-top: 12px; }
.cert-grid strong { display: block; font-size: 18px; letter-spacing: -0.4px; }
.cert-grid span { font-size: 10.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.7px; }
.cert-foot { font-size: 11px; color: var(--muted); letter-spacing: 0.4px; }
.print-actions { margin-top: 22px; }
.empty-state { padding: 60px 0; }
.empty-icon { font-size: 40px; margin-bottom: 16px; }
.empty-state h1 { margin-bottom: 10px; }
.empty-state p { color: var(--muted); margin-bottom: 22px; }

/* ---------------- Database page ---------------- */
.db-actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 22px 0 34px; }
.section h2 { margin-top: 32px; }
.steps { margin: 14px 0 0 20px; }
.steps li { margin-bottom: 9px; font-size: 15px; color: var(--ink-2); }
.code-block { background: var(--navy); color: #d7e3ff; border-radius: 12px; padding: 18px; overflow-x: auto; font-size: 12.5px; line-height: 1.7; }
.data-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 13.5px; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.data-table th, .data-table td { text-align: left; padding: 10px 14px; border-top: 1px solid var(--line-2); }
.data-table thead th { background: #fafafc; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.8px; color: var(--muted); border-top: none; }
.data-table td:nth-child(2) { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.note { background: #f2f6ff; border: 1px solid #cfdcfb; border-radius: 12px; padding: 16px 18px; margin-top: 28px; font-size: 13.5px; color: #23386e; }

/* ---------------- Footer ---------------- */
.foot { background: #fff; border-top: 1px solid var(--line); padding: 30px 0 40px; font-size: 12.5px; color: var(--muted); }
.foot-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot-links { display: flex; gap: 20px; }
.foot a { color: var(--muted); }
.foot a:hover { color: var(--ink); }

/* ---------------- Responsive ---------------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; padding-top: 60px; padding-bottom: 64px; }
  .hero h1 { font-size: 50px; }
  .hero-panel { max-width: 620px; }
  .day-layout { grid-template-columns: 1fr; }
  .day-side { position: static; display: grid; grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 34px; }
  .settings-grid { grid-template-columns: 1fr; gap: 22px; }
  .daygrid { grid-template-columns: repeat(3, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  nav.links { display: none; }
  .nav-inner { gap: 10px; }
  .brand-course, .brand-sep { display: none; }
  .chip { display: none; }
  .section { padding: 56px 0; }
  .section h2 { font-size: 30px; }
  .hero h1 { font-size: 40px; letter-spacing: -1.6px; }
  .brief-id h1 { font-size: 32px; }
  .brief-stats { grid-template-columns: repeat(2, 1fr); width: 100%; }
  .day-title-row h1 { font-size: 34px; }
  .day-layout { padding-top: 24px; }
  .block { padding: 20px; }
  .opts { grid-template-columns: 1fr; }
  .day-side { grid-template-columns: 1fr; }
  .profile-stats { grid-template-columns: repeat(2, 1fr); }
  .board-row { grid-template-columns: 28px 1.5fr 0.7fr 0.7fr; }
  .board-row > :nth-child(3), .board-row > :nth-child(6) { display: none; }
  .certificate { padding: 34px 22px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .day-nav a { min-width: 0; flex: 1; }
  .day-nav a strong { font-size: 12.5px; }
}

@media print {
  .nav, .foot, .print-actions, .day-side, .crumbs { display: none !important; }
  body { background: #fff; }
  .certificate { box-shadow: none; border: 1px solid #ccc; }
  .section { padding: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}