:root {
  --bg-top: #f3efe6;
  --bg-bottom: #d9e8e0;
  --panel: rgba(252, 249, 243, 0.92);
  --panel-strong: #fffaf1;
  --ink: #182226;
  --muted: #5b6a6f;
  --accent: #006f68;
  --accent-strong: #014d48;
  --accent-soft: rgba(0, 111, 104, 0.12);
  --error: #a53f2b;
  --success: #1f7a54;
  --border: rgba(24, 34, 38, 0.14);
  --shadow: 0 24px 60px rgba(24, 34, 38, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.8), transparent 30%),
    radial-gradient(circle at bottom right, rgba(0, 111, 104, 0.18), transparent 28%),
    linear-gradient(150deg, var(--bg-top), var(--bg-bottom));
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

code {
  font-family: "SFMono-Regular", "Menlo", monospace;
}

.shell {
  width: min(980px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 48px 0 56px;
}

.shell-narrow {
  width: min(640px, calc(100vw - 2rem));
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent-strong);
}

h1,
h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", serif;
  font-weight: 600;
  line-height: 1.05;
}

h1 {
  font-size: clamp(2.3rem, 6vw, 4.4rem);
  max-width: 12ch;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
}

.lede {
  max-width: 60ch;
  margin: 18px 0 0;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 28px;
  backdrop-filter: blur(14px);
}

.card + .card {
  margin-top: 18px;
}

.login-card {
  max-width: 560px;
}

.messages {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.message {
  border-radius: 16px;
  padding: 12px 14px;
  font-size: 0.95rem;
}

.message.error {
  background: rgba(165, 63, 43, 0.1);
  color: var(--error);
}

.message.success {
  background: rgba(31, 122, 84, 0.1);
  color: var(--success);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.95rem;
  font-weight: 600;
}

.field small {
  color: var(--muted);
  line-height: 1.5;
}

.field input[type="text"],
.field input[type="file"] {
  width: 100%;
  border: 1px solid rgba(24, 34, 38, 0.18);
  border-radius: 18px;
  background: var(--panel-strong);
  color: var(--ink);
  padding: 14px 16px;
  font-size: 1rem;
}

.field input[type="file"] {
  padding: 12px 14px;
}

.field input:focus {
  outline: none;
  border-color: rgba(0, 111, 104, 0.45);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.field-wide {
  grid-column: 1 / -1;
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-start;
  margin-top: 4px;
}

.form-single {
  grid-template-columns: 1fr;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: white;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(1, 77, 72, 0.22);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(1, 77, 72, 0.28);
}

.result-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 12px;
}

.stats div {
  background: rgba(255, 255, 255, 0.54);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 14px 16px;
}

.stats strong {
  display: block;
  font-size: 1.35rem;
}

.stats span {
  color: var(--muted);
  font-size: 0.9rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.download-tile {
  display: grid;
  gap: 10px;
  padding: 18px;
  border-radius: 22px;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.75), rgba(245, 249, 247, 0.95));
  border: 1px solid var(--border);
  transition: transform 150ms ease, border-color 150ms ease;
}

.download-tile:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 111, 104, 0.4);
}

.download-tile .label {
  color: var(--muted);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.download-tile strong {
  font-size: 1rem;
  line-height: 1.45;
}

@media (max-width: 820px) {
  .form-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .result-header,
  .stats {
    grid-template-columns: 1fr;
    display: grid;
  }
}