:root {
  --green-light: #1FAE63;
  --green-dark: #128047;
  --orange: #FFA200;
  --ink: #1A2E22;
  --ink-soft: #4B5D53;
  --bg: #FAF9F0;
  --card: #FFFFFF;
  --border: #E3E8E0;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.hero {
  text-align: center;
  margin-bottom: 32px;
}

.logo-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 12px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--green-light), var(--green-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(18, 128, 71, 0.25);
}

.logo-mark svg { width: 34px; height: 34px; }

h1 {
  font-size: 28px;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.tagline {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0;
}

.badge {
  display: inline-block;
  margin-top: 10px;
  padding: 4px 12px;
  border-radius: 999px;
  background: #EAF6EE;
  color: var(--green-dark);
  font-size: 12.5px;
  font-weight: 600;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.field { margin-bottom: 18px; }

label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--ink);
}

.hint {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-top: 4px;
}

select, input[type="text"], textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
}

select:focus, input:focus, textarea:focus {
  outline: none;
  border-color: var(--green-light);
  box-shadow: 0 0 0 3px rgba(31, 174, 99, 0.15);
}

textarea { resize: vertical; min-height: 90px; }

.field-error { border-color: #E24949 !important; }

#ratio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ratio-btn {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 13.5px;
  cursor: pointer;
  color: var(--ink-soft);
}

.ratio-btn.active {
  background: var(--green-light);
  border-color: var(--green-light);
  color: #fff;
  font-weight: 600;
}

.btn-primary {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: var(--orange);
  color: #1A1A1A;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

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

#output-wrap[hidden] { display: none; }

#output {
  width: 100%;
  min-height: 260px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  background: #F4F6F2;
  white-space: pre-wrap;
}

.copy-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.btn-secondary {
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--green-dark);
  background: var(--green-dark);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

#copy-status {
  font-size: 13px;
  color: var(--green-dark);
  font-weight: 600;
}

footer {
  text-align: center;
  color: var(--ink-soft);
  font-size: 12.5px;
  margin-top: 32px;
}

footer a { color: var(--green-dark); }