:root {
  color-scheme: dark;
  --bg: #101311;
  --surface: #171c19;
  --ink: #eaf0e9;
  --dim: #a3aea4;
  --muted: #6f7c72;
  --line: rgba(225, 242, 227, .14);
  --line-strong: rgba(225, 242, 227, .23);
  --lime: #c6ff53;
  --cyan: #66dcff;
  --coral: #ff775b;
  --mono: "DM Mono", "IBM Plex Mono", "Courier New", monospace;
  --display: "Manrope", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  --copy: "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  --pad: clamp(18px, 5vw, 72px);
  font-family: var(--copy);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background:
    radial-gradient(ellipse at 78% 17%, rgba(39, 77, 66, .2), transparent 38%),
    var(--bg);
  color: var(--ink);
  font: 14px/1.65 var(--copy);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 70px;
  flex: 0 0 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--pad);
  border-bottom: 1px solid var(--line);
  background: rgba(16, 19, 17, .88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font: 700 15px/1 var(--display);
}

.site-brand img {
  width: 35px;
  height: 35px;
  border-radius: 4px;
  object-fit: cover;
  filter: drop-shadow(0 0 13px rgba(102, 220, 255, .14));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav a {
  min-height: 38px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 14px;
  color: var(--dim);
  font-size: 11px;
  transition: color .2s;
}

.site-nav a:hover {
  color: var(--lime);
}

.site-nav .nav-link-feature {
  border: 1px solid rgba(198, 255, 83, .29);
  color: var(--lime);
}

.site-nav svg,
.site-menu svg,
.page-head-mark svg,
.back-link svg,
.site-footer svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.site-menu {
  display: none;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.site-menu svg {
  width: 18px;
  height: 18px;
}

.page {
  width: min(100% - 2 * var(--pad), 1120px);
  flex: 1 0 auto;
  margin-inline: auto;
  padding: 43px 0 48px;
}

.page-head {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 25px;
  padding: 18px 0 24px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-head::after {
  position: absolute;
  top: -180px;
  right: 5%;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(102, 220, 255, .13);
  border-radius: 50%;
  box-shadow: 0 0 0 24px rgba(102, 220, 255, .025), 0 0 0 48px rgba(102, 220, 255, .02);
  content: "";
  pointer-events: none;
}

.page-code {
  margin: 0 0 10px;
  color: var(--lime);
  font: 9px/1.5 var(--mono);
  letter-spacing: .1em;
}

.page-head h1 {
  margin: 0;
  font: 800 clamp(36px, 5vw, 54px)/1.04 var(--display);
  letter-spacing: -.035em;
}

.page-head > div > p:last-child {
  max-width: 620px;
  margin: 12px 0 0;
  color: var(--dim);
  font-size: 12px;
}

.page-head-mark {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(102, 220, 255, .26);
  color: var(--cyan);
}

.page-head-mark svg {
  width: 23px;
  height: 23px;
}

.page-content {
  padding-top: 25px;
}

.tool-content {
  min-height: 230px;
}

.tool-content-placeholder {
  min-height: 230px;
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 25px;
  border: 1px dashed var(--line-strong);
  background: linear-gradient(130deg, rgba(255, 255, 255, .025), rgba(255, 255, 255, .005));
  text-align: center;
}

.placeholder-code {
  color: var(--muted);
  font: 8px/1.5 var(--mono);
  letter-spacing: .1em;
}

.tool-content-placeholder p {
  margin: 0;
  color: var(--dim);
  font-size: 11px;
}

.tool-card {
  min-width: 0;
  padding: clamp(17px, 3vw, 27px);
  border: 1px solid var(--line);
  background: linear-gradient(130deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
}

.tool-section-title {
  margin: 0 0 14px;
  font: 600 15px/1.4 var(--display);
}

.tool-description {
  margin: 0 0 16px;
  color: var(--dim);
  font-size: 11px;
  line-height: 1.9;
}

.tool-field {
  display: grid;
  gap: 6px;
  margin-top: 15px;
}

.tool-field > label,
.tool-label {
  color: var(--dim);
  font-size: 10px;
}

.tool-input,
.tool-select,
.tool-textarea {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: rgba(5, 8, 6, .47);
  color: var(--ink);
  font-size: 11px;
}

.tool-textarea {
  min-height: 100px;
  resize: vertical;
}

.tool-input::placeholder,
.tool-textarea::placeholder {
  color: var(--muted);
}

.tool-input:focus,
.tool-select:focus,
.tool-textarea:focus {
  border-color: var(--cyan);
}

.tool-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--dim);
  font-size: 10px;
}

.tool-check input {
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
  margin: 2px 0 0;
  accent-color: var(--lime);
}

.tool-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 18px;
}

.tool-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 15px;
  border: 1px solid transparent;
  font-size: 10px;
  cursor: pointer;
  transition: color .2s, background .2s, border-color .2s, transform .2s;
}

.tool-button-primary {
  background: var(--lime);
  color: var(--bg);
  font-weight: 700;
}

.tool-button-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  background: #dcff95;
}

.tool-button-secondary {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--dim);
}

.tool-button-secondary:hover:not(:disabled) {
  border-color: var(--cyan);
  color: var(--cyan);
}

.tool-button:disabled {
  opacity: .42;
  cursor: not-allowed;
}

.tool-status {
  color: var(--dim);
  font-size: 9px;
}

.tool-status[data-state="success"] {
  color: var(--lime);
}

.tool-status[data-state="error"] {
  color: var(--coral);
}

.back-link {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  color: var(--dim);
  font-size: 10px;
  transition: color .2s, gap .2s;
}

.back-link:hover {
  gap: 12px;
  color: var(--lime);
}

.site-footer {
  width: min(1220px, calc(100% - 2 * var(--pad)));
  min-height: 47px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font: 8px/1.5 var(--mono);
  letter-spacing: .06em;
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--dim);
  transition: color .2s;
}

.site-footer a:hover {
  color: var(--lime);
}

.site-footer svg {
  width: 12px;
  height: 12px;
  color: var(--lime);
}

@media (max-width: 800px) {
  .page {
    padding-top: 34px;
  }
}

@media (max-width: 620px) {
  :root {
    --pad: 18px;
  }

  .site-header {
    height: 59px;
    flex-basis: 59px;
  }

  .site-brand {
    gap: 8px;
    font-size: 14px;
  }

  .site-brand img {
    width: 31px;
    height: 31px;
  }

  .site-nav {
    position: absolute;
    top: 59px;
    left: 0;
    right: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 7px var(--pad) 13px;
    border-bottom: 1px solid var(--line);
    background: rgba(14, 18, 15, .97);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
  }

  .site-nav.is-open {
    display: flex;
    animation: menu-drop .22s ease both;
  }

  .site-nav a {
    min-height: 43px;
    padding-inline: 7px;
    border-bottom: 1px solid var(--line);
  }

  .site-menu {
    display: grid;
  }

  .page {
    width: calc(100% - 2 * var(--pad));
    padding: 26px 0 35px;
  }

  .page-head {
    gap: 10px;
    padding: 9px 0 18px;
  }

  .page-code {
    margin-bottom: 7px;
    font-size: 8px;
  }

  .page-head h1 {
    font-size: 36px;
  }

  .page-head > div > p:last-child {
    max-width: 260px;
    margin-top: 8px;
    font-size: 10px;
  }

  .page-head-mark {
    width: 42px;
    height: 42px;
  }

  .page-content {
    padding-top: 18px;
  }

  .tool-content,
  .tool-content-placeholder {
    min-height: 190px;
  }

  .tool-content-placeholder {
    padding: 18px;
  }

  .tool-card {
    padding: 14px;
  }

  .tool-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer {
    min-height: 39px;
    gap: 8px;
    font-size: 7px;
  }

  .site-footer > span:first-child {
    max-width: 36%;
  }
}

@media (max-width: 360px) {
  :root {
    --pad: 14px;
  }

  .site-footer {
    gap: 6px;
    font-size: 6px;
  }
}

@keyframes menu-drop {
  from { opacity: 0; transform: translateY(-7px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}