:root,
html[data-theme="dark"] {
  --bg: #12171e;
  --bg-glow-1: #1d2a38;
  --bg-glow-2: #173028;
  --panel: #1b232e;
  --panel-2: #222c3a;
  --ink: #e8eef5;
  --muted: #8fa0b3;
  --line: #2c384a;
  --accent: #3ddc97;
  --accent-ink: #062416;
  --warn: #e8a838;
  --danger: #f07178;
  --focus: #6ec8ff;
  --code-bg: #0c1016;
  --code-ink: #d7e7d2;
  --priv-ink: #f3e6c8;
  --bulb: #6b7a8d;
  --bulb-fill: #2a3340;
  --mono: "IBM Plex Mono", "Cascadia Code", "SF Mono", Consolas, "Liberation Mono", monospace;
  --sans: "IBM Plex Sans", "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}

html[data-theme="light"] {
  --bg: #eef2f6;
  --bg-glow-1: #d9e6f2;
  --bg-glow-2: #d8ebe0;
  --panel: #ffffff;
  --panel-2: #f4f7fa;
  --ink: #1a2430;
  --muted: #5c6b7c;
  --line: #c9d3de;
  --accent: #0f9d6e;
  --accent-ink: #f3fff9;
  --warn: #b7791f;
  --danger: #c23b45;
  --focus: #1a7aed;
  --code-bg: #1b2430;
  --code-ink: #d7e7d2;
  --priv-ink: #6b4e16;
  --bulb: #e6a819;
  --bulb-fill: #ffe9a0;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--bg-glow-1) 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, var(--bg-glow-2) 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}

body {
  min-height: 100vh;
}

.theme-toggle {
  flex: 0 0 auto;
  width: 2.1rem;
  height: 2.1rem;
  min-height: 2.1rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--bulb);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--bulb);
}

.theme-toggle .bulb {
  display: block;
}

.theme-toggle .bulb-glow {
  fill: var(--bulb-fill);
  stroke: var(--bulb);
  stroke-width: 1.4;
}

.theme-toggle .bulb-base {
  fill: var(--bulb);
  opacity: 0.85;
}

.theme-toggle .bulb-filament {
  fill: none;
  stroke: var(--bulb);
  stroke-width: 1.3;
  stroke-linecap: round;
  opacity: 0.35;
}

html[data-theme="light"] .theme-toggle .bulb-glow {
  filter: drop-shadow(0 0 5px color-mix(in srgb, var(--bulb) 70%, transparent));
}

html[data-theme="light"] .theme-toggle .bulb-filament {
  opacity: 1;
  stroke: #b7791f;
}

@media (prefers-reduced-motion: no-preference) {
  html,
  body {
    transition: background-color 0.2s ease, color 0.2s ease;
  }

  .theme-toggle .bulb-glow {
    transition: fill 0.2s ease, filter 0.2s ease;
  }
}

.page {
  width: min(920px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.header {
  margin-bottom: 1.75rem;
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 1.1rem;
}

.brand h1 {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.tagline-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.55rem;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.repo-link {
  flex: 0 0 auto;
  margin-left: auto;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.9rem;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  white-space: nowrap;
}

.repo-link:hover {
  border-bottom-color: var(--accent);
}

.repo-link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1rem;
  padding: 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 9.5rem;
}

.field-grow {
  flex: 1 1 16rem;
}

.field-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.85rem 1rem;
  flex: 1 1 100%;
  width: 100%;
}

.field-row .field {
  flex: 0 1 12rem;
  min-width: 8rem;
}

.field-row .field-grow {
  flex: 1 1 auto;
  min-width: 10rem;
}

label {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--mono);
}

label .opt {
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.85em;
  opacity: 0.85;
}

.guide-note {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-family: var(--mono);
}

select,
input[type="text"],
input[type="password"],
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--ink);
  border-radius: 0;
  font: inherit;
  padding: 0.65rem 0.75rem;
}

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

.actions {
  display: flex;
  align-items: flex-end;
  gap: 0.6rem;
  flex: 1 1 auto;
}

button {
  font-family: var(--sans);
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  padding: 0.7rem 1.1rem;
  min-height: 44px;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 650;
  border-color: var(--accent);
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.05);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--ink);
  border-color: var(--muted);
}

.btn-small {
  min-height: 36px;
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
  background: var(--panel-2);
  color: var(--ink);
  border-color: var(--line);
}

.btn-small:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.status {
  min-height: 1.4rem;
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-family: var(--mono);
}

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

.status.ok {
  color: var(--accent);
}

.output {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.key-block {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 0.9rem;
}

.key-block.private {
  border-color: color-mix(in srgb, var(--warn) 45%, var(--line));
}

.key-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.65rem;
}

.key-head h2 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
}

.fname {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
}

.key-actions {
  display: flex;
  gap: 0.4rem;
}

textarea {
  resize: vertical;
  min-height: 4.5rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre;
}

#private-key {
  min-height: 14rem;
  color: var(--priv-ink);
}

.guide {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.guide h2 {
  margin: 0 0 0.9rem;
  font-size: 1.05rem;
}

.guide-list {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.guide-list > div {
  display: grid;
  gap: 0.25rem;
}

.guide-list dt {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
}

.guide-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.guide-list code,
.guide-lead code,
.cmd-list code {
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--ink);
  background: var(--panel);
  padding: 0.08em 0.35em;
  border: 1px solid var(--line);
}

.guide.register {
  margin-top: 1.75rem;
}

.guide-lead {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.cmd-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.25rem;
}

.cmd-list h3 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.cmd-list p {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.cmd {
  position: relative;
  margin: 0 0 0.55rem;
  padding: 0.75rem 4.5rem 0.75rem 0.85rem;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  overflow-x: auto;
}

.cmd code {
  display: block;
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--code-ink);
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre;
  cursor: pointer;
}

.cmd-copy {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  z-index: 1;
  min-height: 32px;
  padding: 0.25rem 0.55rem;
  font-size: 0.75rem;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  cursor: pointer;
}

.cmd-copy:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.cmd-copy.is-copied {
  border-color: var(--accent);
  color: var(--accent);
}

.cmd.is-copied {
  outline: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
}

.field-note {
  margin: 0.35rem 0 0.55rem;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
  display: grid;
  gap: 0.25rem;
}

.guide.config,
.guide.cli {
  margin-top: 1.75rem;
}

.footer {
  margin-top: 2.5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

@media (max-width: 560px) {
  .page {
    width: min(100% - 1.25rem, 920px);
    padding-top: 1.25rem;
  }

  .field-row {
    flex-wrap: wrap;
  }

  .actions {
    width: 100%;
  }

  .actions .btn-primary,
  .actions .btn-ghost {
    flex: 1;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .output[data-reveal="1"] .key-block {
    animation: rise 0.35s ease-out both;
  }

  .output[data-reveal="1"] .key-block.private {
    animation-delay: 0.08s;
  }

  @keyframes rise {
    from {
      opacity: 0;
      transform: translateY(6px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }
}