:root {
  --bg: #f4efe4;
  --paper: #fffaf0;
  --ink: #1f1c18;
  --ink-soft: #5e5548;
  --accent: #0b6e4f;
  --accent-2: #a2671f;
  --danger: #a22c29;
  --line: #d8ccb9;
  --shadow: 0 12px 30px rgba(63, 46, 23, 0.12);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Avenir Next", "Gill Sans", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 10%, #ffecc6 0%, transparent 45%),
    radial-gradient(circle at 90% 30%, #d2f2e7 0%, transparent 50%),
    var(--bg);
  line-height: 1.5;
}

.bg-glow {
  position: fixed;
  width: 34rem;
  height: 34rem;
  border-radius: 999px;
  opacity: 0.24;
  filter: blur(60px);
  pointer-events: none;
  z-index: -1;
}

.bg-glow-a {
  background: #f9ad5c;
  top: -8rem;
  left: -9rem;
}

.bg-glow-b {
  background: #74c69d;
  right: -10rem;
  bottom: -11rem;
}

.layout {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.4rem 1rem 3rem;
  display: grid;
  gap: 1rem;
}

.hero {
  text-align: center;
  animation: fade-up 420ms ease both;
}

.eyebrow {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent-2);
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-top: 0.2rem;
}

.subhead {
  margin: 0.6rem 0 0;
  color: var(--ink-soft);
}

.card {
  background: linear-gradient(175deg, #fffdf8 0%, var(--paper) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  animation: fade-up 420ms ease both;
}

.puzzle-card {
  animation-delay: 80ms;
}

.answer-card {
  animation-delay: 130ms;
}

.hints-card {
  animation-delay: 170ms;
}

.solution-card {
  animation-delay: 210ms;
}

.monetization-card {
  animation-delay: 240ms;
}

.meta-row {
  display: none;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.2rem 0.68rem;
  font-weight: 700;
  font-size: 0.84rem;
  background: #dbf5e8;
  color: #0a5a41;
}

.pill-muted {
  background: #f3e6d3;
  color: #7f4f1f;
}

.statement {
  white-space: normal;
  margin-bottom: 0;
}

textarea {
  width: 100%;
  margin-top: 0.7rem;
  border: 1px solid #ccbca5;
  border-radius: 12px;
  background: #fffef9;
  color: var(--ink);
  padding: 0.75rem;
  resize: vertical;
  font: inherit;
}

textarea:focus {
  outline: 2px solid #86ceb5;
  border-color: transparent;
}

.actions {
  margin-top: 0.65rem;
}

.btn {
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #f4fff8;
  padding: 0.58rem 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.btn:hover {
  filter: brightness(1.05);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.btn-secondary {
  background: #8f5a1f;
}

.btn-danger {
  background: var(--danger);
}

.result {
  margin-top: 0.8rem;
  border: 1px dashed #cdbca8;
  border-radius: 12px;
  padding: 0.7rem;
  background: #fffdf8;
}

.hints-head,
.solution-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.hints-list {
  margin: 0.8rem 0 0;
  padding-left: 1.1rem;
}

.hints-list li {
  margin-bottom: 0.56rem;
}

.small-note {
  margin: 0.6rem 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.solution-text {
  margin-top: 0.8rem;
  border: 1px dashed #d9cbb6;
  border-radius: 12px;
  background: #fffcf5;
  padding: 0.75rem;
  max-height: 380px;
  overflow: auto;
  font-size: 0.95rem;
}

.ad-slot {
  display: block;
  width: 100%;
  min-height: 90px;
  border: 1px dashed #d9cbb6;
  border-radius: 10px;
  background: #fff8ec;
  margin-top: 0.6rem;
}

.ad-placeholder {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
  color: #5f5748;
}

.site-footer {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  padding: 0.4rem 0 0.8rem;
}

.site-footer a {
  color: #7a4e1e;
  font-weight: 600;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.markdown-block p {
  margin: 0.55rem 0;
}

.markdown-block ul,
.markdown-block ol {
  margin: 0.5rem 0 0.65rem;
}

.markdown-block table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.markdown-block th,
.markdown-block td {
  border: 1px solid #dccdb8;
  padding: 0.45rem 0.5rem;
  text-align: left;
}

.markdown-block th {
  background: #f3e5cf;
}

.markdown-block code {
  background: #efe4d2;
  border-radius: 5px;
  padding: 0.1rem 0.25rem;
}

.markdown-block pre {
  background: #f4ead8;
  border: 1px solid #dfd0bc;
  border-radius: 10px;
  padding: 0.6rem;
  overflow-x: auto;
}

.markdown-block blockquote {
  border-left: 4px solid #ccab79;
  margin: 0.7rem 0;
  padding: 0.1rem 0.75rem;
  color: #4f4435;
  background: #fff5e5;
}

.markdown-block .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.2rem 0.1rem;
}

.markdown-block .math-fallback-block {
  margin: 0.6rem 0;
  padding: 0.55rem 0.65rem;
  border: 1px dashed #cfbda6;
  border-radius: 10px;
  background: #fbf1e2;
  color: #3f3529;
  white-space: pre-wrap;
  overflow-x: auto;
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
}

.markdown-block .math-fallback-inline {
  background: #f2e8d8;
  color: #3f3529;
  border-radius: 6px;
  padding: 0.08rem 0.3rem;
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
}

.ad-dialog {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem;
  width: min(90vw, 360px);
  background: #fff9ef;
  color: var(--ink);
}

.ad-dialog::backdrop {
  background: rgba(20, 20, 20, 0.4);
}

.progress-track {
  margin-top: 0.7rem;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #eadcc7;
  overflow: hidden;
}

.progress-fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #f28c38, #e9c46a, #2a9d8f);
  transition: width 0.25s linear;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 700px) {
  .layout {
    padding: 1rem 0.74rem 2rem;
  }

  .hints-head,
  .solution-head {
    align-items: flex-start;
    flex-direction: column;
  }
}