:root {
  --bg: #f4f7f1;
  --ink: #13221a;
  --accent: #1f6f4a;
  --card: #ffffff;
  --muted: #577065;
  --border: #d4dfd8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 10% 10%, #dfeee4 0, var(--bg) 45%);
}

.layout {
  width: min(920px, 92vw);
  margin: 3rem auto;
  display: grid;
  gap: 1rem;
}

.hero {
  background: linear-gradient(135deg, #153425, #1f6f4a);
  color: #fff;
  border-radius: 14px;
  padding: 1.8rem;
}

.hero a {
  color: #e8fff4;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  margin: 0 0 0.4rem;
  opacity: 0.8;
}

h1,
h2,
p {
  margin-top: 0;
}

.price-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.price-row div {
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  min-width: 170px;
}

.price-row strong {
  display: block;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

form {
  display: grid;
  gap: 0.7rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="url"],
select,
textarea {
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 0.64rem;
  font: inherit;
}

textarea {
  resize: vertical;
}

.checkbox {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.advanced {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 0.7rem;
}

.advanced summary {
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font: inherit;
  padding: 0.62rem 0.9rem;
  cursor: pointer;
}

button[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.secondary {
  background: transparent;
  color: var(--accent);
}

.buttons {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.result {
  border-radius: 10px;
  background: #10231b;
  color: #f5fffa;
  padding: 0.8rem;
  overflow-x: auto;
  white-space: pre;
  font-family: "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;
}

.hidden {
  display: none;
}

code {
  background: #e7f0ea;
  border-radius: 5px;
  padding: 0.12rem 0.3rem;
}

a {
  color: var(--accent);
}

ul {
  margin-top: 0;
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.metrics-links {
  display: grid;
  gap: 0.5rem;
}

.assist {
  margin-top: 0.8rem;
  padding: 0.8rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #edf6f1;
  display: grid;
  gap: 0.6rem;
}

.assist p {
  margin: 0;
}

.assist-note {
  font-family: "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;
  font-size: 0.84rem;
  color: var(--muted);
}

.button-link {
  display: inline-block;
  width: fit-content;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
  text-decoration: none;
}

@media (max-width: 640px) {
  .layout {
    margin: 1.2rem auto;
  }

  .hero {
    padding: 1.2rem;
  }
}