/* ============================================
   CONCRETE & SIGNAL — YCC Tech Division
   Brutalist-editorial aesthetic
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,400&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* --- Tokens --- */
:root {
  --bg-deep: #0B0B0F;
  --bg-surface: #131318;
  --bg-raised: #1A1A22;
  --bg-hover: #22222D;
  --text-primary: #E8E4DC;
  --text-secondary: #8A8693;
  --text-muted: #5C5868;
  --accent: #FF3E2C;
  --accent-glow: rgba(255, 62, 44, 0.15);
  --gold: #F0C246;
  --gold-dim: rgba(240, 194, 70, 0.12);
  --green: #2ECC71;
  --green-dim: rgba(46, 204, 113, 0.12);
  --border: #2A2A35;
  --border-light: #1E1E28;
  --font-display: 'Syne', sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

/* Noise overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.label--accent { color: var(--accent); }
.label--gold { color: var(--gold); }

/* --- Layout --- */
.container {
  width: min(1320px, 92vw);
  margin: 0 auto;
}

.container--narrow {
  width: min(960px, 92vw);
  margin: 0 auto;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 4vw;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(11, 11, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}

.nav__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav__brand span {
  color: var(--accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.2s;
  position: relative;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
}

.nav__links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}

.nav__cta {
  font-family: var(--font-mono) !important;
  font-size: 0.72rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.08em !important;
  text-transform: uppercase !important;
  color: var(--bg-deep) !important;
  background: var(--accent) !important;
  padding: 0.5rem 1.2rem !important;
  border-radius: 0 !important;
  transition: background 0.2s, transform 0.2s !important;
}

.nav__cta:hover {
  background: #ff5a4a !important;
  transform: translateY(-1px) !important;
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
  z-index: 1001;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.3s var(--ease-out-expo), opacity 0.2s;
}

.nav__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav__mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(11, 11, 15, 0.95);
  backdrop-filter: blur(30px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}

.nav__mobile-overlay.open {
  display: flex;
}

.nav__mobile-overlay a {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color 0.2s;
}

.nav__mobile-overlay a:hover {
  color: var(--accent);
}

/* --- Hero (Index) --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 4vw 80px;
  position: relative;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70vw;
  height: 70vw;
  max-width: 900px;
  max-height: 900px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.6;
}

.hero__label {
  margin-bottom: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.hero__label::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}

.hero__title {
  font-size: clamp(3.2rem, 8vw, 7.5rem);
  max-width: 14ch;
  margin-bottom: 2rem;
  position: relative;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}

.hero__title em::after {
  content: '';
  position: absolute;
  bottom: 0.05em;
  left: -0.05em;
  right: -0.05em;
  height: 0.12em;
  background: var(--accent);
  opacity: 0.2;
  transform: skewX(-4deg);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 52ch;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: 3.5rem;
  margin-top: 5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border);
}

.hero__stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.4rem;
  color: var(--gold);
  line-height: 1;
}

.hero__stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.85rem 2rem;
  transition: all 0.25s var(--ease-out-expo);
  position: relative;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-deep);
}

.btn--primary:hover {
  background: #ff5a4a;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 62, 44, 0.25);
}

.btn--outline {
  border: 1.5px solid var(--border);
  color: var(--text-primary);
  background: transparent;
}

.btn--outline:hover {
  border-color: var(--text-secondary);
  background: var(--bg-raised);
  transform: translateY(-2px);
}

.btn--gold {
  background: var(--gold);
  color: var(--bg-deep);
}

.btn--gold:hover {
  background: #f5cf5a;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(240, 194, 70, 0.25);
}

.btn--ghost {
  color: var(--text-secondary);
  padding: 0.85rem 0;
}

.btn--ghost:hover {
  color: var(--text-primary);
}

.btn--ghost .arrow {
  transition: transform 0.25s var(--ease-out-expo);
}

.btn--ghost:hover .arrow {
  transform: translateX(4px);
}

/* --- Section Basics --- */
.section {
  padding: 100px 4vw;
  position: relative;
}

.section--bordered {
  border-top: 1px solid var(--border);
}

.section__header {
  margin-bottom: 4rem;
}

.section__eyebrow {
  margin-bottom: 1rem;
}

.section__title {
  font-size: clamp(2rem, 4.5vw, 3.8rem);
  max-width: 20ch;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 55ch;
  margin-top: 1.2rem;
  line-height: 1.7;
}

/* --- Initiative Cards (Index) --- */
.initiatives {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.initiative-card {
  background: var(--bg-deep);
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  transition: background 0.3s;
  position: relative;
}

.initiative-card:hover {
  background: var(--bg-surface);
}

.initiative-card__icon {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  line-height: 1;
}

.initiative-card__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.initiative-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 1.5rem;
}

.initiative-card__link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.25s var(--ease-out-expo);
}

.initiative-card:hover .initiative-card__link {
  gap: 0.8rem;
}

/* --- Prize Page --- */
.prize-hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 120px 4vw 80px;
  position: relative;
  overflow: hidden;
}

.prize-hero__bg {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 60vh;
  background: radial-gradient(ellipse at center, var(--gold-dim) 0%, transparent 65%);
  filter: blur(60px);
  pointer-events: none;
}

.prize-hero__amount {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(5rem, 15vw, 14rem);
  color: var(--gold);
  line-height: 0.85;
  margin-bottom: 1.5rem;
  letter-spacing: -0.04em;
}

.prize-hero__title {
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  max-width: 30ch;
  margin-bottom: 1.5rem;
}

.prize-hero__desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 60ch;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

/* Criteria */
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.criteria-card {
  background: var(--bg-deep);
  padding: 2.5rem;
  position: relative;
}

.criteria-card__rank {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 4rem;
  color: var(--bg-raised);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
}

.criteria-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.criteria-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--border);
}

.timeline__item {
  padding: 0 0 3rem 2rem;
  position: relative;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -2.55rem;
  top: 0.3rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--bg-deep);
}

.timeline__item.active .timeline__dot {
  background: var(--gold);
  box-shadow: 0 0 12px rgba(240, 194, 70, 0.4);
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.timeline__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.timeline__desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Eligibility */
.eligibility-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.eligibility-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--bg-surface);
  border-left: 3px solid var(--border);
  font-size: 0.98rem;
  color: var(--text-secondary);
}

.eligibility-list li::before {
  content: '>';
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}

/* --- Bounty Board --- */
.bounty-grid {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.bounty-card {
  background: var(--bg-deep);
  padding: 2.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
  transition: background 0.3s;
}

.bounty-card:hover {
  background: var(--bg-surface);
}

.bounty-card__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.bounty-card__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
}

.bounty-card__amount {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--green);
  background: var(--green-dim);
  padding: 0.25rem 0.75rem;
  letter-spacing: 0.04em;
}

.bounty-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 70ch;
  margin-bottom: 1rem;
}

.bounty-card__tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.bounty-card__tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
}

.bounty-card__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
  flex-shrink: 0;
}

.bounty-card__status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.bounty-card__status--open { color: var(--green); }
.bounty-card__status--claimed { color: var(--gold); }

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

.btn--claim {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.65rem 1.5rem;
  border: 1.5px solid var(--green);
  color: var(--green);
  background: transparent;
  transition: all 0.25s var(--ease-out-expo);
}

.btn--claim:hover {
  background: var(--green);
  color: var(--bg-deep);
  transform: translateY(-1px);
}

/* Bounty detail expanded */
.bounty-card__detail {
  grid-column: 1 / -1;
  display: none;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
}

.bounty-card__detail.open {
  display: block;
}

.bounty-card__detail h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.bounty-card__detail ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.bounty-card__detail ul li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  padding-left: 1.2rem;
  position: relative;
}

.bounty-card__detail ul li::before {
  content: '//';
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  position: absolute;
  left: 0;
}

/* --- Spec Block (Bounty Page) --- */
.spec-block {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 2rem;
  margin-top: 1.5rem;
}

.spec-block__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.spec-block__content {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* --- CTA Banner --- */
.cta-banner {
  padding: 80px 4vw;
  text-align: center;
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta-banner__bg {
  position: absolute;
  bottom: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 50vh;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 65%);
  filter: blur(60px);
  pointer-events: none;
}

.cta-banner__title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: 1rem;
  position: relative;
}

.cta-banner__desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 50ch;
  margin: 0 auto 2rem;
  position: relative;
}

/* --- Footer --- */
.footer {
  padding: 3rem 4vw;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__left {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.footer__right {
  display: flex;
  gap: 1.5rem;
}

.footer__right a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  transition: color 0.2s;
}

.footer__right a:hover {
  color: var(--text-primary);
}

/* --- Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease-out-expo), transform 0.5s var(--ease-out-expo);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.08s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.16s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.24s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.32s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.40s; opacity: 1; transform: translateY(0); }

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 11, 15, 0.9);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  max-width: 540px;
  width: 100%;
  padding: 3rem;
  position: relative;
}

.modal__close {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s;
  background: none;
  border: none;
}

.modal__close:hover {
  color: var(--text-primary);
}

.modal__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.modal__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.modal__form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal__form input,
.modal__form textarea {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.8rem 1rem;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.modal__form input:focus,
.modal__form textarea:focus {
  border-color: var(--text-muted);
}

.modal__form input:invalid:not(:placeholder-shown),
.modal__form textarea:invalid:not(:placeholder-shown) {
  border-color: var(--accent);
}

.form-error {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  margin-top: -0.5rem;
  display: none;
}

.form-error.visible {
  display: block;
}

.modal__form textarea {
  resize: vertical;
  min-height: 80px;
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-grid__text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
}

.about-grid__text p + p {
  margin-top: 1.2rem;
}

.about-grid__sidebar {
  border-left: 1px solid var(--border);
  padding-left: 3rem;
}

.about-grid__sidebar-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.about-grid__sidebar-item:first-child {
  padding-top: 0;
}

.about-grid__sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.about-grid__sidebar-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

/* --- Responsive --- */
/* 4-col variant for prize steps */
.initiatives--four {
  grid-template-columns: repeat(4, 1fr);
}

/* Explicit 2-col variant for about grids */
.about-grid--half {
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 900px) {
  .initiatives,
  .initiatives--four {
    grid-template-columns: 1fr;
  }

  .about-grid--half {
    grid-template-columns: 1fr;
  }

  .criteria-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-grid__sidebar {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border);
    padding-top: 2rem;
  }

  .hero__stats {
    gap: 2rem;
    flex-wrap: wrap;
  }

  .bounty-card {
    grid-template-columns: 1fr;
    padding: 2rem;
  }

  .bounty-card__actions {
    flex-direction: row;
    align-items: center;
  }

  .footer {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .hero {
    padding-top: 100px;
    min-height: auto;
    padding-bottom: 60px;
  }

  .section {
    padding: 60px 4vw;
  }

  .bounty-card {
    padding: 1.5rem;
  }

  .bounty-card__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Selection --- */
::selection {
  background: var(--accent);
  color: var(--bg-deep);
}

/* --- Utilities --- */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.text-accent { color: var(--accent); }
.text-gold { color: var(--gold); }
.text-green { color: var(--green); }