:root {
  --paper: #f4ead6;
  --sheet: #fff8ec;
  --ink: #3b2416;
  --ink-soft: #6a4a36;
  --sage: #4f6d4e;
  --sage-deep: #38513a;
  --clay: #c45c38;
  --honey: #e0a53a;
  --sky: #7aa8b8;
  --line: #d7c4a4;
  --shadow: 0 18px 40px rgba(59, 36, 22, 0.12);
}

* {
  box-sizing: border-box;
}

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

body {
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
  background:
    radial-gradient(circle at 12% 18%, rgba(224, 165, 58, 0.18), transparent 36%),
    radial-gradient(circle at 88% 8%, rgba(122, 168, 184, 0.2), transparent 32%),
    linear-gradient(180deg, #efe2c6 0%, var(--paper) 48%, #e7d3b2 100%);
}

.desk {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 56px;
}

.mast {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding: 0 8px;
}

.mark {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  font-weight: 700;
}

.mark a,
.grade a,
.hint a,
footer a {
  color: inherit;
  text-decoration: none;
}

.hint a,
footer a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.grade {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.sheet {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 36px 36px 32px;
  position: relative;
}

.sheet::before {
  content: "";
  position: absolute;
  inset: 14px auto auto 22px;
  width: 46px;
  height: 14px;
  background: rgba(196, 92, 56, 0.28);
  transform: rotate(-8deg);
  border-radius: 2px;
}

.stamp {
  margin: 0 0 10px;
  color: var(--clay);
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.15;
  font-weight: 700;
}

.lede {
  margin: 0 0 22px;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.55;
}

.subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
}

.subjects li {
  background: #f3e4c7;
  border: 1px dashed #c9ae82;
  border-radius: 999px;
  padding: 6px 12px;
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  font-size: 0.86rem;
  color: var(--sage-deep);
}

.banner {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-radius: 12px;
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  font-size: 0.95rem;
}

.banner-error {
  background: #f8e0d6;
  color: #7a2d18;
}

.banner-warn {
  background: #f6e7c2;
  color: #6a4d12;
}

.banner-ok {
  background: #dce8d8;
  color: var(--sage-deep);
}

.download-form {
  display: grid;
  gap: 10px;
  max-width: 420px;
}

.download-form label {
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  font-size: 0.92rem;
}

.download-form input {
  width: 100%;
  border: 2px solid #d3b892;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 1rem;
  background: #fffdf7;
  color: var(--ink);
}

.download-form input:focus {
  outline: 3px solid rgba(79, 109, 78, 0.35);
  border-color: var(--sage);
}

.download-form button,
.unlocked + button {
  justify-self: start;
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  background: var(--sage);
  color: #f7f3ea;
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  font-size: 1rem;
  cursor: pointer;
}

.download-form button:hover {
  background: var(--sage-deep);
}

.unlocked {
  margin: 0 0 4px;
  color: var(--ink-soft);
}

.hint {
  margin: 26px 0 0;
  color: #8a6b52;
  font-size: 0.92rem;
  line-height: 1.45;
}

footer {
  padding: 18px 8px 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .desk {
    width: min(100%, calc(100% - 20px));
    padding-top: 20px;
  }

  .mast {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .sheet {
    padding: 28px 20px 24px;
    border-radius: 22px;
  }
}