/* ============================================================
   ctfXT — Season 1 · Design System
   Professional CTF / bounty platform
   ============================================================ */

:root {
    /* Surfaces */
    --bg: #0A0C10;
    --bg-raised: #10141B;
    --bg-overlay: #151A23;
    --bg-inset: #0B0E13;

    /* Lines */
    --border: rgba(148, 163, 184, 0.09);
    --border-strong: rgba(148, 163, 184, 0.17);

    /* Text */
    --text-1: #EBEEF4;
    --text-2: #99A3B4;
    --text-3: #5E6879;

    /* Brand / money */
    --gold: #E5B04C;
    --gold-bright: #F2CE84;
    --gold-deep: #C78F2E;
    --gold-grad: linear-gradient(180deg, #F6DC9A 0%, #E9B75A 55%, #D29A35 100%);
    --gold-dim: rgba(229, 176, 76, 0.12);
    --gold-line: rgba(229, 176, 76, 0.32);

    /* Difficulty */
    --easy: #3ECF8E;
    --medium: #5EA8F5;
    --hard: #F59E4C;
    --expert: #F0616D;

    /* Status */
    --ok: #3ECF8E;
    --off: #5E6879;
    --warn: #E5B04C;

    /* Type */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

    /* Geometry */
    --radius: 14px;
    --radius-sm: 9px;
    --maxw: 1120px;

    /* Elevation */
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-2: 0 12px 32px -12px rgba(0, 0, 0, 0.55);
}

/* ---------- Reset / base ---------- */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text-2);
    font-family: var(--font-ui);
    font-size: 15.5px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

::selection { background: rgba(229, 176, 76, 0.28); color: #FFF7E6; }

a { color: var(--text-1); }

h1, h2, h3, h4 { color: var(--text-1); font-weight: 700; letter-spacing: -0.015em; }

code, pre, .mono { font-family: var(--font-mono); }

.num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

button { font-family: inherit; }

:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
    border-radius: 4px;
}

.container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Shared atoms ---------- */

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-3);
}

.eyebrow::before {
    content: '';
    width: 18px;
    height: 2px;
    background: var(--gold);
    border-radius: 1px;
}

/* Difficulty chip */
.chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid;
    white-space: nowrap;
}

.chip::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.chip.easy   { color: var(--easy);   background: rgba(62, 207, 142, 0.08);  border-color: rgba(62, 207, 142, 0.22); }
.chip.medium { color: var(--medium); background: rgba(94, 168, 245, 0.08);  border-color: rgba(94, 168, 245, 0.22); }
.chip.hard   { color: var(--hard);   background: rgba(245, 158, 76, 0.08);  border-color: rgba(245, 158, 76, 0.22); }
.chip.expert { color: var(--expert); background: rgba(240, 97, 109, 0.08);  border-color: rgba(240, 97, 109, 0.22); }

/* Status pill */
.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-2);
    white-space: nowrap;
}

.pill .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--off);
    flex: none;
}

.pill.funded  { color: var(--ok); }
.pill.funded .dot {
    background: var(--ok);
    animation: pulse 2.4s ease-in-out infinite;
}

.pill.drained { color: var(--text-3); }
.pill.drained .dot { background: var(--off); }

.pill.awaiting { color: var(--warn); }
.pill.awaiting .dot { background: var(--warn); }

.pill.unknown { color: var(--text-3); }

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(62, 207, 142, 0.35); }
    50%      { box-shadow: 0 0 0 5px rgba(62, 207, 142, 0); }
}

/* Tags */
.tag {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    background: rgba(148, 163, 184, 0.07);
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 6px;
    white-space: nowrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: 0.01em;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease,
                border-color 0.15s ease, color 0.15s ease;
    user-select: none;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
    background: var(--gold-grad);
    color: #241A05;
    box-shadow: 0 1px 0 rgba(255, 235, 190, 0.35) inset, var(--shadow-1);
}

.btn-primary:hover {
    filter: brightness(1.06);
    box-shadow: 0 1px 0 rgba(255, 235, 190, 0.35) inset, 0 8px 22px -8px rgba(229, 176, 76, 0.45);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-2);
    border-color: var(--border-strong);
}

.btn-ghost:hover {
    color: var(--text-1);
    border-color: rgba(148, 163, 184, 0.35);
    background: rgba(148, 163, 184, 0.05);
}

.btn-sm { padding: 7px 13px; font-size: 12.5px; }

.btn .arrow { font-family: var(--font-mono); font-weight: 400; }

/* Live dot (nav) */
.live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ok);
    animation: pulse 2.4s ease-in-out infinite;
    flex: none;
}

/* ---------- Navigation ---------- */

.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 12, 16, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
    height: 62px;
    display: flex;
    align-items: center;
    gap: 28px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    text-decoration: none;
    flex: none;
}

.brand-mark {
    width: 32px;
    height: 32px;
    object-fit: contain;
    display: block;
    flex: none;
    filter: drop-shadow(0 0 6px rgba(0, 229, 255, 0.22));
}

.footer .brand-mark { width: 26px; height: 26px; }

.brand-word {
    font-weight: 800;
    font-size: 15px;
    letter-spacing: 0.14em;
    color: var(--text-1);
}

.brand-chip {
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--gold);
    border: 1px solid var(--gold-line);
    background: var(--gold-dim);
    padding: 3px 7px;
    border-radius: 5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}

.nav-links a {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-2);
    text-decoration: none;
    padding: 7px 12px;
    border-radius: 7px;
    transition: color 0.15s, background 0.15s;
}

.nav-links a:hover { color: var(--text-1); background: rgba(148, 163, 184, 0.06); }

.nav-links a.active {
    color: var(--text-1);
    background: rgba(148, 163, 184, 0.09);
}

.nav-links a.nav-api {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-3);
}

.nav-status {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    border: 1px solid var(--border);
    background: var(--bg-raised);
    padding: 7px 13px;
    border-radius: 999px;
    white-space: nowrap;
}

.nav-status .num { color: var(--gold); font-weight: 600; }

/* ---------- Hero ---------- */

.hero {
    position: relative;
    padding: 96px 0 72px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse 90% 80% at 50% 0%, black 25%, transparent 78%);
    -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 0%, black 25%, transparent 78%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: -180px;
    left: 50%;
    transform: translateX(-50%);
    width: 720px;
    height: 420px;
    background: radial-gradient(ellipse, rgba(229, 176, 76, 0.075) 0%, transparent 65%);
    pointer-events: none;
}

.hero-inner { position: relative; z-index: 1; }

.hero h1.prize {
    font-size: clamp(64px, 11vw, 128px);
    font-weight: 800;
    letter-spacing: -0.045em;
    line-height: 0.98;
    margin: 22px 0 6px;
    display: flex;
    align-items: baseline;
    gap: 18px;
    flex-wrap: wrap;
}

.hero h1.prize .amount {
    background: var(--gold-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-variant-numeric: tabular-nums;
}

.hero h1.prize .unit {
    font-size: 0.32em;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-3);
}

.hero-fiat {
    font-size: 17px;
    color: var(--text-2);
    font-weight: 500;
    margin-bottom: 20px;
}

.hero-fiat .num { color: var(--text-1); font-weight: 600; }

.hero-desc {
    font-size: 16.5px;
    max-width: 620px;
    margin-bottom: 34px;
    color: var(--text-2);
}

.hero-desc strong { color: var(--text-1); font-weight: 600; }

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-raised);
    overflow: hidden;
}

.hstat {
    padding: 20px 24px;
    border-left: 1px solid var(--border);
}

.hstat:first-child { border-left: none; }

.hstat-value {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: -0.02em;
    line-height: 1.15;
    font-variant-numeric: tabular-nums;
}

.hstat-value .unit { font-size: 13px; color: var(--text-3); font-weight: 600; }

.hstat-value.gold { color: var(--gold); }

.hstat-label {
    font-size: 11.5px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-top: 4px;
}

/* ---------- Sections ---------- */

.section { padding: 64px 0 8px; }

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.section-head h2 {
    font-size: 26px;
    letter-spacing: -0.02em;
    margin-top: 12px;
}

.section-head .sub {
    font-size: 14px;
    color: var(--text-3);
    margin-top: 6px;
    max-width: 520px;
}

.legend { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Prize distribution bar ---------- */

.prizebar { margin-bottom: 8px; }

.prizebar-track {
    display: flex;
    height: 64px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-inset);
}

.prizebar-seg {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-left: 1px solid var(--bg);
    min-width: 0;
    text-decoration: none;
    transition: filter 0.15s ease;
}

.prizebar-seg:first-child { border-left: none; }

.prizebar-seg:hover { filter: brightness(1.35); }

.prizebar-seg .seg-val {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-1);
    white-space: nowrap;
}

.prizebar-seg .seg-val .unit { font-size: 10px; color: inherit; opacity: 0.75; }

.prizebar-seg.easy   { background: rgba(62, 207, 142, 0.16);  color: var(--easy); }
.prizebar-seg.medium { background: rgba(94, 168, 245, 0.16);  color: var(--medium); }
.prizebar-seg.hard   { background: rgba(245, 158, 76, 0.16);  color: var(--hard); }
.prizebar-seg.expert { background: rgba(229, 176, 76, 0.2);   color: var(--gold); }

.prizebar-labels {
    display: flex;
    margin-top: 10px;
}

.prizebar-labels .pl {
    font-size: 11.5px;
    color: var(--text-3);
    border-left: 1px solid transparent;
    padding: 0 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.prizebar-labels .pl:first-child { padding-left: 2px; }

/* ---------- Challenge cards ---------- */

.challenge-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px 28px 24px;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
}

.card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 16px;
}

.card-id {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.card-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-3);
    letter-spacing: 0.06em;
}

.card-bounty { text-align: right; flex: none; }

.card-bounty .val {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-1);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.card-bounty .val .unit {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-3);
    letter-spacing: 0.04em;
    margin-left: 3px;
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin-bottom: 8px;
}

.card-desc {
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 16px;
    flex: 1;
}

.card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.card-actions { display: flex; gap: 9px; flex-wrap: wrap; }

/* Featured (Final Boss) card */
.card.featured {
    grid-column: 1 / -1;
    border-color: var(--gold-line);
    background:
        radial-gradient(ellipse 60% 130% at 88% 50%, rgba(229, 176, 76, 0.07) 0%, transparent 70%),
        var(--bg-raised);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 40px;
    align-items: center;
}

.card.featured:hover {
    border-color: rgba(229, 176, 76, 0.5);
    box-shadow: 0 16px 44px -16px rgba(229, 176, 76, 0.18);
}

.featured-flag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 14px;
}

.featured-flag::before {
    content: '';
    width: 22px;
    height: 1.5px;
    background: var(--gold);
}

.card.featured .card-title { font-size: 26px; }

.card.featured .card-bounty .val {
    font-size: 56px;
    background: var(--gold-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.card.featured .card-bounty .val .unit {
    font-size: 18px;
    color: var(--text-3);
    -webkit-text-fill-color: var(--text-3);
}

.card.featured .card-bounty { text-align: right; }

.featured-side {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 16px;
}

/* ---------- Steps (how it works) ---------- */

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.step {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    position: relative;
}

.step-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.step-num::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.step h3 { font-size: 15.5px; margin-bottom: 6px; }

.step p { font-size: 13px; color: var(--text-3); line-height: 1.55; }

/* ---------- Rules ---------- */

.rules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.rule {
    display: flex;
    gap: 18px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
}

.rule-num {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    color: var(--gold);
    padding-top: 2px;
    flex: none;
}

.rule h3 { font-size: 15.5px; margin-bottom: 5px; }

.rule p { font-size: 13.5px; color: var(--text-3); line-height: 1.55; }

.rule p code { color: var(--text-2); font-size: 12px; }

/* ---------- Footer ---------- */

.footer {
    margin-top: 88px;
    border-top: 1px solid var(--border);
    background: var(--bg-raised);
}

.footer-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 34px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-3);
}

.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }

.footer-links a {
    font-size: 13px;
    color: var(--text-2);
    text-decoration: none;
    transition: color 0.15s;
}

.footer-links a:hover { color: var(--gold); }

.footer-note {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px 26px;
    font-size: 12px;
    color: var(--text-3);
    opacity: 0.75;
}

/* ---------- Scoreboard ---------- */

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}

.summary-card {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
}

.summary-card .sc-label {
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 8px;
}

.summary-card .sc-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-1);
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
}

.summary-card .sc-value .unit { font-size: 13px; color: var(--text-3); font-weight: 600; }

.summary-card .sc-value.gold { color: var(--gold); }

.summary-card .sc-sub { font-size: 12px; color: var(--text-3); margin-top: 5px; }

.claimbar {
    height: 8px;
    border-radius: 999px;
    background: var(--bg-inset);
    border: 1px solid var(--border);
    overflow: hidden;
    margin: 6px 0 30px;
}

.claimbar-fill {
    height: 100%;
    width: 0%;
    background: var(--gold-grad);
    border-radius: 999px;
    transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.board {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.board-head,
.board-row {
    display: grid;
    grid-template-columns: 56px 1.35fr 1.5fr 0.62fr 0.72fr 0.85fr;
    align-items: center;
    gap: 16px;
    padding: 15px 24px;
}

.board-head {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-3);
    background: var(--bg-inset);
    border-bottom: 1px solid var(--border);
}

.board-row {
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}

.board-row:last-child { border-bottom: none; }

.board-row:hover { background: rgba(148, 163, 184, 0.03); }

.board-row.drained { opacity: 0.55; }

.br-stage {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-3);
    font-weight: 500;
}

.br-name { display: flex; flex-direction: column; gap: 5px; min-width: 0; }

.br-name .t {
    font-size: 14.5px;
    font-weight: 600;
    color: var(--text-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.br-wallet { display: flex; align-items: center; gap: 8px; min-width: 0; }

.br-wallet code {
    font-size: 12.5px;
    color: var(--text-2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.icon-btn {
    display: inline-grid;
    place-items: center;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-3);
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
    flex: none;
    text-decoration: none;
}

.icon-btn:hover {
    color: var(--text-1);
    border-color: var(--border-strong);
    background: rgba(148, 163, 184, 0.06);
}

.icon-btn svg { width: 13px; height: 13px; }

.br-bounty {
    font-weight: 700;
    color: var(--text-1);
    font-size: 14.5px;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.br-bounty .unit { font-size: 11px; color: var(--text-3); font-weight: 600; }

.br-balance {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-2);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.board-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 24px;
    font-size: 12px;
    color: var(--text-3);
    border-top: 1px solid var(--border);
    background: var(--bg-inset);
    flex-wrap: wrap;
}

.board-foot .live { display: inline-flex; align-items: center; gap: 8px; }

/* ---------- Challenge detail pages ---------- */

.crumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-3);
    text-decoration: none;
    margin: 34px 0 26px;
    transition: color 0.15s;
}

.crumb:hover { color: var(--text-1); }

.ch-head {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
    align-items: start;
    margin-bottom: 48px;
}

.ch-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.ch-meta .num {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-3);
    letter-spacing: 0.08em;
}

.ch-title {
    font-size: clamp(30px, 4.5vw, 42px);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 14px;
}

.ch-lede { font-size: 16px; color: var(--text-2); max-width: 560px; }

.ch-lede strong { color: var(--text-1); font-weight: 600; }

/* Bounty panel */
.bounty-panel {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    position: sticky;
    top: 86px;
}

.bp-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 8px;
}

.bp-amount {
    font-size: 44px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--text-1);
    font-variant-numeric: tabular-nums;
    margin-bottom: 14px;
}

.bp-amount .unit { font-size: 16px; color: var(--text-3); font-weight: 600; }

.bp-amount.gold {
    background: var(--gold-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.bp-status { margin-bottom: 18px; }

.bp-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
    color: var(--text-3);
    padding: 10px 0;
    border-top: 1px solid var(--border);
}

.bp-row .v {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-2);
    font-variant-numeric: tabular-nums;
}

.bp-wallet {
    margin-top: 14px;
    background: var(--bg-inset);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
}

.bp-wallet code {
    display: block;
    font-size: 11.5px;
    color: var(--text-2);
    word-break: break-all;
    line-height: 1.6;
    margin-bottom: 12px;
}

.bp-wallet .row { display: flex; gap: 8px; }

.bp-wallet .row .btn { flex: 1; }

/* Content sections on challenge pages */
.ch-section { margin-bottom: 44px; }

.ch-section > h2 {
    font-size: 19px;
    letter-spacing: -0.01em;
    margin-bottom: 6px;
}

.ch-section > .sub {
    font-size: 14px;
    color: var(--text-3);
    margin-bottom: 20px;
    max-width: 640px;
}

.ch-section p.body { font-size: 14.5px; max-width: 680px; margin-bottom: 12px; }

.ch-section p.body code, .ch-section li code {
    font-size: 12.5px;
    color: var(--gold-bright);
    background: rgba(229, 176, 76, 0.07);
    border: 1px solid rgba(229, 176, 76, 0.16);
    padding: 1.5px 6px;
    border-radius: 5px;
}

.ch-section ul.body { padding-left: 20px; max-width: 680px; }

.ch-section ul.body li { font-size: 14.5px; margin-bottom: 8px; }

/* Panel (generic) */
.panel {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 13px 18px;
    background: var(--bg-inset);
    border-bottom: 1px solid var(--border);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
}

.panel-head .method {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 5px;
    letter-spacing: 0.06em;
}

.method.get  { color: var(--easy);   background: rgba(62, 207, 142, 0.1); }
.method.post { color: var(--medium); background: rgba(94, 168, 245, 0.1); }

.panel-body { padding: 18px; }

/* Terminal block */
.term {
    background: var(--bg-inset);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.75;
    color: var(--text-2);
    overflow-x: auto;
}

.term .c { color: var(--text-3); }          /* comment */
.term .p { color: var(--gold); }            /* prompt */
.term .g { color: var(--easy); }            /* good */
.term .b { color: var(--medium); }          /* path */
.term .w { color: var(--text-1); }          /* highlight */

/* Tester form */
.tester-form { display: grid; gap: 14px; }

.field label {
    display: block;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 7px;
}

.input, textarea.input {
    width: 100%;
    background: var(--bg-inset);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text-1);
    font-family: var(--font-mono);
    font-size: 13.5px;
    padding: 11px 14px;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(229, 176, 76, 0.14);
}

.input::placeholder { color: var(--text-3); }

.presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.presets .pl-label {
    font-size: 11.5px;
    color: var(--text-3);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-right: 2px;
}

.preset {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-2);
    background: rgba(148, 163, 184, 0.06);
    border: 1px solid var(--border);
    padding: 5px 11px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
}

.preset:hover {
    color: var(--gold-bright);
    border-color: var(--gold-line);
    background: var(--gold-dim);
}

/* Response console */
.console {
    margin-top: 16px;
    background: var(--bg-inset);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.console-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-3);
}

.console-head .status-code {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 5px;
    letter-spacing: 0.04em;
}

.status-code.ok  { color: var(--easy);   background: rgba(62, 207, 142, 0.1); }
.status-code.err { color: var(--expert); background: rgba(240, 97, 109, 0.1); }

.console-body {
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: 12.8px;
    line-height: 1.7;
    color: var(--text-2);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 380px;
    overflow-y: auto;
}

.console-body:empty::before {
    content: '// Response will appear here';
    color: var(--text-3);
}

.console-body::-webkit-scrollbar { width: 8px; }
.console-body::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.18); border-radius: 4px; }

/* Hints */
.hint {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    overflow: hidden;
}

.hint summary {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-2);
    cursor: pointer;
    list-style: none;
    transition: color 0.15s, background 0.15s;
    user-select: none;
}

.hint summary::-webkit-details-marker { display: none; }

.hint summary::before {
    content: '+';
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--gold);
    width: 18px;
    text-align: center;
    flex: none;
    transition: transform 0.2s;
}

.hint[open] summary::before { transform: rotate(45deg); }

.hint summary:hover { color: var(--text-1); background: rgba(148, 163, 184, 0.03); }

.hint .hint-body {
    padding: 0 18px 16px 48px;
    font-size: 13.5px;
    color: var(--text-3);
    line-height: 1.65;
}

.hint .hint-body code {
    font-size: 12px;
    color: var(--gold-bright);
    background: rgba(229, 176, 76, 0.07);
    border: 1px solid rgba(229, 176, 76, 0.16);
    padding: 1.5px 6px;
    border-radius: 5px;
}

.hint .hint-body .term { margin-top: 10px; }

/* Claim steps */
.claim-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.claim-step {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.claim-step .cs-num {
    font-family: var(--font-mono);
    font-size: 11.5px;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.1em;
    margin-bottom: 10px;
}

.claim-step h3 { font-size: 14.5px; margin-bottom: 6px; }

.claim-step p { font-size: 13px; color: var(--text-3); line-height: 1.55; }

.claim-step p code { font-size: 11.5px; color: var(--text-2); }

/* Prev / next nav */
.pn-nav {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    margin-top: 56px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}

.pn-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-decoration: none;
    padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s, background 0.15s;
    min-width: 200px;
}

.pn-link:hover { border-color: var(--border-strong); background: var(--bg-raised); }

.pn-link .dir {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
}

.pn-link .t { font-size: 14.5px; font-weight: 600; color: var(--text-1); }

.pn-link.next { text-align: right; align-items: flex-end; }

/* Key assembly (final) */
.assembly { display: grid; gap: 12px; }

.part-row {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 14px;
    align-items: center;
}

.part-row .part-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-2);
}

.part-row .part-label .src {
    display: block;
    font-size: 11px;
    color: var(--text-3);
    font-weight: 500;
    margin-top: 2px;
}

.assembly-out {
    margin-top: 16px;
    background: var(--bg-inset);
    border: 1px solid var(--gold-line);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
}

.assembly-out .ao-label {
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 8px;
}

.assembly-out code {
    display: block;
    font-size: 13px;
    color: var(--text-1);
    word-break: break-all;
    line-height: 1.7;
    min-height: 22px;
}

.assembly-out .ao-check {
    margin-top: 10px;
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--text-3);
}

.assembly-out .ao-check.ok { color: var(--easy); }
.assembly-out .ao-check.bad { color: var(--expert); }

/* Toast */
.toast {
    position: fixed;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%) translateY(16px);
    background: var(--bg-overlay);
    border: 1px solid var(--border-strong);
    color: var(--text-1);
    font-size: 13px;
    font-weight: 500;
    padding: 11px 20px;
    border-radius: 999px;
    box-shadow: var(--shadow-2);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 9px;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.toast .t-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gold);
}

/* Utility */
.gold-text { color: var(--gold); }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .hstat:nth-child(3) { border-left: none; }
    .hstat { border-top: 1px solid var(--border); }
    .hstat:nth-child(-n+2) { border-top: none; }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .summary-grid { grid-template-columns: repeat(2, 1fr); }
    .ch-head { grid-template-columns: 1fr; gap: 28px; }
    .bounty-panel { position: static; }
    .board-head { display: none; }
    .board-row {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 18px 20px;
    }
    .br-stage { display: none; }
    .claim-steps { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    body { font-size: 15px; }
    .nav-inner { gap: 14px; height: auto; padding: 12px 16px; flex-wrap: wrap; }
    .nav-status { display: none; }
    .container { padding: 0 16px; }
    .hero { padding: 56px 0 48px; }
    .challenge-grid { grid-template-columns: 1fr; }
    .card.featured { grid-template-columns: 1fr; }
    .featured-side { align-items: flex-start; }
    .card.featured .card-bounty { text-align: left; }
    .rules-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .prizebar-track { height: 52px; }
    .prizebar-seg .seg-val { font-size: 11px; }
    .prizebar-labels .pl { font-size: 10px; padding: 0 4px; }
    .part-row { grid-template-columns: 1fr; gap: 6px; }
    .pn-nav { flex-direction: column; }
    .pn-link.next { text-align: left; align-items: flex-start; }
    .summary-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- Motion preferences ---------- */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}