:root {
  color-scheme: light;
  --bg: #eef3f1;
  --bg-accent: #d7ebe4;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #152033;
  --muted: #60708a;
  --line: rgba(21, 32, 51, 0.12);
  --primary: #0f9d7a;
  --primary-strong: #0c7b60;
  --danger: #b64c57;
  --danger-soft: #fff1f3;
  --success-soft: #edf9f5;
  --shadow: 0 18px 48px rgba(28, 44, 63, 0.10);
  --radius: 24px;
  --radius-sm: 16px;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", "Arial Nova", sans-serif;
  --mono: "SFMono-Regular", "SF Mono", "Cascadia Code", "Roboto Mono", monospace;
}

* {
  box-sizing: border-box;
}

*::selection {
  background: #173a63;
  color: #f7fbff;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(15, 157, 122, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(24, 96, 164, 0.10), transparent 24%),
    linear-gradient(180deg, #f6faf8 0%, var(--bg) 100%);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
}

a {
  color: var(--primary-strong);
  text-decoration-color: rgba(12, 123, 96, 0.35);
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration-color: currentColor;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: 14px;
  padding: 7px 12px;
  border: 1px solid rgba(15, 157, 122, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.65);
  color: var(--primary-strong);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
label,
.kv-label {
  letter-spacing: -0.03em;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 0.94;
}

h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  line-height: 1.05;
}

.lead,
.section-heading p,
.hint {
  color: var(--muted);
}

.lead {
  max-width: 44rem;
  margin: 16px 0 0;
  font-size: 1.1rem;
}

.card {
  position: relative;
  margin-top: 24px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.44), rgba(255, 255, 255, 0.10));
  pointer-events: none;
}

.card > * {
  position: relative;
  z-index: 1;
}

.form-card {
  overflow: hidden;
}

.form-card::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 157, 122, 0.16), transparent 72%);
  pointer-events: none;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading p {
  margin: 10px 0 0;
}

label,
input,
button {
  display: block;
  width: 100%;
}

label {
  margin-bottom: 10px;
  font-size: 1.15rem;
  font-weight: 700;
}

input {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 20px;
  background: rgba(248, 250, 252, 0.96);
  color: var(--text);
  font: inherit;
  font-size: 1.02rem;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

input::placeholder {
  color: #8a96a9;
}

input:focus {
  outline: none;
  border-color: rgba(15, 157, 122, 0.55);
  box-shadow: 0 0 0 5px rgba(15, 157, 122, 0.14);
  transform: translateY(-1px);
}

.hint {
  margin: 10px 0 18px;
  font-size: 0.96rem;
}

button {
  border: none;
  border-radius: 18px;
  padding: 18px 22px;
  background: linear-gradient(135deg, var(--primary) 0%, #1798cf 100%);
  color: #f8fcff;
  font: inherit;
  font-size: 1.08rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 18px 34px rgba(15, 157, 122, 0.18);
  transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
}

button:hover {
  filter: saturate(1.05);
  transform: translateY(-1px);
  box-shadow: 0 22px 38px rgba(15, 157, 122, 0.24);
}

button:active {
  transform: translateY(0);
}

.output {
  border-color: rgba(15, 157, 122, 0.20);
}

.result-grid {
  display: grid;
  gap: 14px;
}

.kv {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
}

.kv-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.kv-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.copy-button {
  width: auto;
  min-width: 104px;
  padding: 10px 14px;
  border: 1px solid rgba(21, 32, 51, 0.10);
  border-radius: 12px;
  background: var(--surface-strong);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
  box-shadow: none;
}

.copy-button:hover {
  box-shadow: none;
  transform: translateY(-1px);
}

.copy-button.copied {
  background: var(--success-soft);
  color: var(--primary-strong);
  border-color: rgba(15, 157, 122, 0.24);
}

.status-badge {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.status-badge.success {
  background: var(--success-soft);
  color: var(--primary-strong);
}

.status-badge.error {
  background: var(--danger-soft);
  color: var(--danger);
}

code,
.long-link {
  display: block;
  overflow-wrap: anywhere;
  word-break: break-word;
}

code {
  font-family: var(--mono);
  font-size: 0.98rem;
  white-space: pre-wrap;
}

.api-card code {
  padding: 0;
}

@media (max-width: 720px) {
  .container {
    padding: 28px 14px 48px;
  }

  .card {
    padding: 22px 18px;
    border-radius: 20px;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.3rem, 12vw, 3.6rem);
  }

  input,
  button {
    border-radius: 16px;
  }

  .kv-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .copy-button {
    width: 100%;
  }
}