:root {
  --bg: #0f1b26;
  --bg-soft: #152635;
  --card: rgba(255, 255, 255, 0.08);
  --card-strong: rgba(255, 255, 255, 0.14);
  --ink: #f6f2e9;
  --ink-soft: rgba(246, 242, 233, 0.7);
  --accent: #f4c95d;
  --accent-strong: #ff9f1c;
  --accent-cool: #2ec4b6;
  --danger: #ff6b6b;
  --shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Alegreya Sans", "Gill Sans", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #1d3142 0%, #0b131d 60%);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(244, 201, 93, 0.2) 0%,
    rgba(244, 201, 93, 0) 70%
  );
  top: -120px;
  right: -120px;
  z-index: 0;
}

body::after {
  background: radial-gradient(
    circle,
    rgba(46, 196, 182, 0.22) 0%,
    rgba(46, 196, 182, 0) 70%
  );
  top: auto;
  bottom: -180px;
  left: -140px;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.75rem;
  color: var(--accent);
  margin: 0 0 6px;
}

h1 {
  font-family: "Cinzel", "Playfair Display", "Georgia", serif;
  font-size: clamp(2rem, 3vw, 3rem);
  margin: 0 0 10px;
}

.hero-subtitle {
  max-width: 520px;
  color: var(--ink-soft);
  margin: 0 0 20px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  min-width: min(420px, 100%);
}

.stat-card {
  background: var(--card);
  padding: 16px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(360px, 1.5fr) minmax(240px, 1fr);
  gap: 18px;
}

.panel {
  background: var(--card);
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
  animation: float-in 0.6s ease both;
}

.panel.log {
  grid-column: 1 / -1;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-kicker {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.7rem;
  color: var(--ink-soft);
  margin: 0 0 4px;
}

h2 {
  margin: 0;
  font-size: 1.25rem;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
}

.toggle input {
  width: 18px;
  height: 18px;
}

.miner-list {
  display: grid;
  gap: 12px;
}

.miner-card {
  background: var(--card-strong);
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  gap: 8px;
  transition: transform 0.2s ease, border 0.2s ease;
}

.miner-card.winner {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.miner-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.miner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.miner-meta {
  font-size: 0.85rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
}

.miner-hash {
  font-size: 0.8rem;
  color: var(--ink-soft);
  background: rgba(0, 0, 0, 0.25);
  padding: 6px 8px;
  border-radius: 10px;
  overflow-wrap: anywhere;
}

.panel-footer {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.difficulty-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.difficulty-control input {
  width: 140px;
}

.chip {
  background: rgba(244, 201, 93, 0.2);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.puzzle-card {
  background: var(--card-strong);
  padding: 16px;
  border-radius: 16px;
  display: grid;
  gap: 16px;
}

.header-grid {
  display: grid;
  gap: 12px;
}

.header-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--ink-soft);
  letter-spacing: 0.14em;
}

.header-value {
  margin-top: 6px;
  overflow-wrap: anywhere;
}

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

.hash-panel {
  background: rgba(0, 0, 0, 0.3);
  padding: 14px;
  border-radius: 14px;
  display: grid;
  gap: 8px;
}

.hash-label {
  margin: 0;
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hash-output {
  font-size: 1rem;
  word-break: break-all;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid transparent;
}

.hash-output.success {
  border-color: rgba(46, 196, 182, 0.8);
  color: var(--accent-cool);
}

.hash-output.fail {
  border-color: rgba(255, 107, 107, 0.7);
  color: var(--danger);
}

.status-pill {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.08);
}

.status-pill.success {
  background: rgba(46, 196, 182, 0.2);
  color: var(--accent-cool);
}

.status-pill.fail {
  background: rgba(255, 107, 107, 0.2);
  color: var(--danger);
}

.control-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.meta-pill {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.08);
}

.chain-card {
  background: rgba(0, 0, 0, 0.25);
  padding: 14px;
  border-radius: 16px;
  display: grid;
  gap: 12px;
  min-width: 0;
}

.chain-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.chain-note {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.chain-list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(160px, 1fr);
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
  min-width: 0;
}

.block-card {
  background: rgba(255, 255, 255, 0.08);
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  gap: 6px;
  min-width: 160px;
  animation: pop-in 0.4s ease both;
}

.block-card span {
  overflow-wrap: anywhere;
}

.block-card.empty {
  border-style: dashed;
  color: var(--ink-soft);
  text-align: center;
}

.block-card strong {
  font-size: 0.9rem;
}

.explain-stack {
  display: grid;
  gap: 12px;
}

.explain-card {
  background: rgba(0, 0, 0, 0.25);
  padding: 14px;
  border-radius: 14px;
}

.explain-card h3 {
  margin: 0 0 8px;
}

.explain-card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.5;
}

.explain-card.subtle {
  border: 1px dashed rgba(244, 201, 93, 0.35);
}

.status-card {
  background: rgba(255, 255, 255, 0.08);
  padding: 14px;
  border-radius: 14px;
  display: grid;
  gap: 10px;
}

.status-row {
  display: flex;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.status-row strong {
  color: var(--ink);
}

.log-list {
  display: grid;
  gap: 10px;
  max-height: 220px;
  overflow-y: auto;
}

.log-item {
  background: rgba(0, 0, 0, 0.25);
  padding: 10px 12px;
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--ink-soft);
  animation: fade-in 0.3s ease;
}

.log-item strong {
  color: var(--ink);
}

.log-item.success {
  border-left: 3px solid var(--accent-cool);
}

.log-item.warn {
  border-left: 3px solid var(--danger);
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--accent);
  color: #1a1a1a;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.2);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn.primary {
  background: var(--accent-strong);
}

.btn.slim {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.mono {
  font-family: "IBM Plex Mono", "Cascadia Code", "Fira Code", monospace;
}

.tutorial {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 18, 0.8);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 10;
}

.tutorial.hidden {
  display: none;
}

.tutorial-card {
  background: #101922;
  padding: 24px;
  border-radius: 18px;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow);
}

.tutorial-card h2 {
  margin-top: 0;
}

.tutorial-card ol {
  color: var(--ink-soft);
  line-height: 1.6;
  padding-left: 20px;
}

input[type="number"],
input[type="range"] {
  accent-color: var(--accent);
}

input[type="number"] {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--ink);
  padding: 8px 10px;
  border-radius: 10px;
  width: 120px;
}

@keyframes float-in {
  from {
    transform: translateY(14px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pop-in {
  from {
    transform: scale(0.96);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .panel.log {
    grid-column: auto;
  }

  .hero {
    flex-direction: column;
    align-items: flex-start;
  }
}