*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

:root {
  color-scheme: light;
  --highlight: #ffcc00;
  --bg-top: #eef2ff;
  --bg-bottom: #fffdf3;
  --bg-glow-left: #dce6ff;
  --bg-glow-right: #fff0b8;
  --surface: #ffffff;
  --surface-soft: #f4f5f7;
  --border: #d7dbe0;
  --border-strong: #c4cbd4;
  --text: #333333;
  --accent: #003399;
  --accent-hover: #002b80;
  --accent-soft: #fff5c9;
  --accent-contrast: #ffffff;
  --success: #003399;
  --danger: #b43a2d;
  --field-focus-bg: #ffffff;
  --link-box-text: #2a3c4f;
  --output-text: #263544;
  --doc-text: #3a3f45;
  --code-bg: #eef3ff;
  --code-text: #003399;
  --code-border: #cfdcff;
  --spinner-track: rgba(255, 255, 255, 0.35);
  --spinner-head: rgba(255, 255, 255, 0.95);
  --focus: rgba(255, 204, 0, 0.28);
  --radius: 4px;
  --shadow: 0 14px 35px rgba(9, 31, 55, 0.08);
  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --highlight: #ffcc00;
    --bg-top: #111833;
    --bg-bottom: #171205;
    --bg-glow-left: #1f2f66;
    --bg-glow-right: #4b3f12;
    --surface: #1b1f26;
    --surface-soft: #20252d;
    --border: #323a45;
    --border-strong: #3e4958;
    --text: #e7e8ea;
    --accent: #ffcc00;
    --accent-hover: #f0c200;
    --accent-soft: #2e2a17;
    --accent-contrast: #1b1f26;
    --success: #ffcc00;
    --danger: #e27970;
    --field-focus-bg: #252b35;
    --link-box-text: #cbd7e3;
    --output-text: #dee4ea;
    --doc-text: #d4d9e0;
    --code-bg: #1f2640;
    --code-text: #ffdf66;
    --code-border: #3a4470;
    --spinner-track: rgba(255, 255, 255, 0.28);
    --spinner-head: rgba(255, 255, 255, 0.88);
    --focus: rgba(255, 204, 0, 0.34);
    --shadow: 0 14px 35px rgba(0, 0, 0, 0.34);
  }
}

body {
  margin: 0;
  min-height: 100vh;
  padding: clamp(1rem, 2.6vw, 2rem) 1rem 2.25rem;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(1100px 420px at -5% -15%, var(--bg-glow-left) 0%, transparent 58%),
    radial-gradient(920px 360px at 100% -10%, var(--bg-glow-right) 0%, transparent 54%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

p {
  font-size: 0.9rem;
}

header,
.app-shell,
footer {
  width: min(100%, 720px);
}

header {
  margin: 0.2rem 0 1rem;
  animation: rise-in 0.36s ease-out both;
}

header h1 {
  font-size: clamp(1.5rem, 3.6vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

header h1 span {
  color: var(--accent);
}

.home-title {
  color: inherit;
  text-decoration: none;
}

.home-title:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--focus);
  border-radius: var(--radius);
}

header p {
  margin-top: 0.6rem;
  font-size: 0.95rem;
  line-height: 1.45;
}

.app-shell {
  display: grid;
  gap: 1rem;
}

.nojs-card {
  margin-bottom: 1rem;
  border-color: var(--highlight);
  background: var(--accent-soft);
}

.nojs-card h2 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  color: var(--accent);
}

.nojs-card p {
  margin: 0.45rem 0 0;
  color: var(--doc-text);
}

.nojs-card p:first-of-type {
  margin-top: 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.1rem, 2.6vw, 2rem);
  box-shadow: var(--shadow);
}

.section {
  display: none;
}

.section.active {
  display: block;
  animation: card-in 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

.field+.field {
  margin-top: 1rem;
}

.usecase-grid {
  display: grid;
  gap: 0.65rem;
}

.usecase-option {
  position: relative;
  display: flex;
}

.usecase-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.usecase-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.2rem 0.75rem;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0.78rem 0.82rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.2s ease;
}

.usecase-card:hover {
  border-color: var(--highlight);
  background: var(--accent-soft);
}

.usecase-input:focus-visible+.usecase-card {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--focus);
}

.usecase-input:checked+.usecase-card {
  border-color: var(--highlight);
  background: var(--accent-soft);
}

.usecase-icon {
  width: 1.9rem;
  height: 1.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  grid-row: 1 / span 2;
}

.usecase-icon svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}

.usecase-title {
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.25;
}

.usecase-text {
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.4;
}

.custom-options {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
  padding: 0.9rem;
}

.custom-options .field+.field {
  margin-top: 0.75rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

textarea,
select,
.manual-key-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.5;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

textarea {
  min-height: 138px;
  padding: 0.85rem 0.95rem;
  resize: vertical;
}

select {
  padding: 0.72rem 0.9rem;
  margin-top: 0.2rem;
  appearance: none;
  cursor: pointer;
}

.manual-key-input {
  padding: 0.72rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.87rem;
}

textarea:focus,
select:focus,
.manual-key-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--focus);
  background: var(--field-focus-bg);
}

button {
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.78rem 1.2rem;
  transition: transform 0.14s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
}

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

button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--focus);
}

.btn-primary {
  width: 100%;
  margin-top: 1.2rem;
  background: var(--accent);
  color: var(--accent-contrast);
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn-primary-mt-lg {
  margin-top: 1.45rem;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  padding: 0.52rem 0.8rem;
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 0.82rem;
  white-space: nowrap;
}

.btn-copy:hover {
  background: var(--accent-soft);
  border-color: var(--highlight);
}

.btn-copy-mt {
  margin-top: 0.75rem;
}

.link-box {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.65rem;
  padding: 0.7rem 0.82rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-soft);
}

.copy-value {
  min-width: 0;
  flex: 1;
  word-break: break-word;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--link-box-text);
  user-select: none;
  -webkit-user-select: none;
  cursor: pointer;
  transition: color 0.18s ease;
}

.copy-value:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--focus);
  border-radius: var(--radius);
}

.copy-value.copy-value-copied {
  color: var(--success);
  font-weight: 700;
}

.copy-value.copy-value-error {
  color: var(--danger);
  font-weight: 700;
}

.split-key-block,
.manual-key-block {
  margin-top: 1rem;
}

.text-body {
  margin-top: 0.15rem;
  font-size: 0.91rem;
  line-height: 1.56;
}

.text-error {
  color: var(--danger);
  font-size: 0.9rem;
  line-height: 1.5;
}

.secret-output {
  margin-top: 0.65rem;
  max-height: 320px;
  overflow-y: auto;
  padding: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--output-text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.58;
  white-space: pre-wrap;
  word-break: break-word;
}

code {
  font-family: var(--font-mono);
  background: var(--code-bg);
  color: var(--code-text);
  border: 1px solid var(--code-border);
  padding: 0.08rem 0.3rem;
  border-radius: var(--radius);
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--spinner-track);
  border-top-color: var(--spinner-head);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

footer {
  margin-top: 1.35rem;
  font-size: 0.75rem;
  line-height: 1.4;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
  align-items: center;
}

.footer-links a {
  color: var(--accent);
  text-decoration: none;
}

.footer-links a:hover {
  border-bottom-color: var(--accent);
}

.footer-hosted {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.footer-github {
  margin-left: auto;
  color: var(--accent);
  border-bottom: none !important;
  padding-bottom: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.footer-github svg {
  width: auto;
  height: 1rem;
  fill: var(--text);
}

.eu-flag {
  display: block;
  width: 2em;
  height: auto;
}

.doc-shell {
  width: min(100%, 720px);
  display: grid;
  gap: 1rem;
}

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

.doc-back:hover {
  text-decoration: underline;
}

.doc-intro {
  max-width: 68ch;
}

.doc-card h2 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.doc-card p,
.doc-card li {
  color: var(--doc-text);
  font-size: 0.92rem;
  line-height: 1.6;
}

.doc-card ul {
  margin: 0.4rem 0 0.2rem;
  padding-inline-start: 0.9rem;
}

.doc-card p+p {
  margin-top: 0.72rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 900px) {
  .usecase-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  .usecase-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

@media (max-width: 700px) {
  body {
    padding: 0.9rem 0.85rem 1.5rem;
  }

  header p {
    font-size: 0.9rem;
  }

  .card {
    padding: 0;
    background: none;
    box-shadow: none;
    border: none;
  }

  #sec-create {
    width: calc(100% + 1.7rem);
    margin-inline: -0.85rem;
    border-left: none;
    border-right: none;
    border-radius: 0;
    padding-inline: 1rem;
  }

  .link-box {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-copy {
    width: 100%;
    margin-left: 0;
  }

  .footer-links {
    flex-direction: column;
    gap: 0.35rem;
  }

  .footer-github {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}