* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #f5f5f7;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: #ffffff;
  --text: #1d1d1f;
  --subtext: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --brand: #1d1d1f;
  --brand-hover: #000000;
  --btn-text: #ffffff;
  --ok: #2c9c67;
  --danger: #d84a4a;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.05);
  --radius: 22px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111113;
    --panel: rgba(28, 28, 30, 0.88);
    --panel-strong: #1c1c1e;
    --text: #f5f5f7;
    --subtext: #a1a1a6;
    --line: rgba(255, 255, 255, 0.11);
    --brand: #f5f5f7;
    --brand-hover: #ffffff;
    --btn-text: #111113;
    --ok: #34c487;
    --danger: #ff6b6b;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.34);
  }
}

:root[data-theme="dark"] {
  --bg: #111113;
  --panel: rgba(28, 28, 30, 0.88);
  --panel-strong: #1c1c1e;
  --text: #f5f5f7;
  --subtext: #a1a1a6;
  --line: rgba(255, 255, 255, 0.11);
  --brand: #f5f5f7;
  --brand-hover: #ffffff;
  --btn-text: #111113;
  --ok: #34c487;
  --danger: #ff6b6b;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.34);
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  letter-spacing: -0.01em;
}

body.theme-pure {
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-strong: #ffffff;
  --line: rgba(0, 0, 0, 0.06);
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.theme-pure {
    --bg: #111113;
    --panel: #1c1c1e;
    --panel-strong: #1c1c1e;
    --text: #f5f5f7;
    --subtext: #a1a1a6;
    --line: rgba(255, 255, 255, 0.11);
    --brand: #f5f5f7;
    --brand-hover: #ffffff;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.34);
  }
}

:root[data-theme="dark"] body.theme-pure {
  --bg: #111113;
  --panel: #1c1c1e;
  --panel-strong: #1c1c1e;
  --text: #f5f5f7;
  --subtext: #a1a1a6;
  --line: rgba(255, 255, 255, 0.11);
  --brand: #f5f5f7;
  --brand-hover: #ffffff;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.34);
}

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

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding: 56px 0 70px;
  position: relative;
  z-index: 1;
}

.hero {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 42px;
  margin-bottom: 26px;
}

.hero-logo {
  width: 56px;
  height: 56px;
  margin-bottom: 18px;
}

.logo-dark {
  display: none;
}

:root[data-theme="dark"] .logo-light {
  display: none;
}

:root[data-theme="dark"] .logo-dark {
  display: inline-block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .logo-light {
    display: none;
  }
  :root:not([data-theme="light"]) .logo-dark {
    display: inline-block;
  }
}

.hero h1 {
  font-size: clamp(30px, 4vw, 44px);
  margin-bottom: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

body.theme-pure .hero {
  padding: 48px;
}

body.theme-pure .hero h1 {
  font-size: clamp(38px, 5.6vw, 62px);
  margin-bottom: 22px;
  letter-spacing: -0.03em;
}

.hero p {
  color: var(--subtext);
  line-height: 1.9;
  max-width: 820px;
  font-size: 16px;
}

.tag-list {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list span {
  border: 1px solid var(--line);
  border-radius: 99px;
  padding: 8px 13px;
  font-size: 12px;
  color: var(--subtext);
  background: rgba(255, 255, 255, 0.72);
}

.grid {
  display: grid;
  gap: 16px;
  margin-bottom: 22px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

body.theme-pure .card,
body.theme-pure .panel {
  padding: 34px;
}

.card {
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.card:hover {
  border-color: rgba(0, 0, 0, 0.14);
  transform: translateY(-1px);
}

.card h2,
.panel h2 {
  font-size: 22px;
  margin-bottom: 14px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

body.theme-pure .card h2,
body.theme-pure .panel h2 {
  font-size: clamp(24px, 3vw, 30px);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.card p,
.panel p,
.note {
  color: var(--subtext);
  line-height: 1.9;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0;
}

button,
.btn {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: var(--brand);
  color: var(--btn-text);
  border-radius: 999px;
  padding: 11px 18px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  box-shadow: none;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease;
}

button:hover,
.btn:hover {
  background: var(--brand-hover);
}

.btn.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
  box-shadow: none;
}

.btn.secondary:hover {
  background: rgba(0, 0, 0, 0.04);
}

pre,
textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  padding: 13px 14px;
  font-size: 14px;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(0, 0, 0, 0.22);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

pre {
  min-height: 140px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(246, 247, 249, 0.98);
  color: #2d2d2f;
  border-color: rgba(0, 0, 0, 0.06);
  line-height: 1.7;
  padding: 16px;
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 14px;
  border-radius: 14px;
  overflow: hidden;
}

th,
td {
  border: 1px solid var(--line);
  padding: 12px 13px;
  text-align: left;
  vertical-align: top;
}

th {
  background: rgba(0, 0, 0, 0.03);
  color: var(--text);
  font-weight: 500;
}

tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.015);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.topbar h1 {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 600;
  letter-spacing: -0.02em;
}

body.theme-pure .topbar h1 {
  font-size: clamp(30px, 4vw, 44px);
  letter-spacing: -0.03em;
}

.theme-toggle {
  position: fixed;
  right: 18px;
  top: 18px;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn.secondary:hover {
    background: rgba(255, 255, 255, 0.08);
  }

  :root:not([data-theme="light"]) .tag-list span {
    background: rgba(255, 255, 255, 0.04);
  }

  :root:not([data-theme="light"]) pre,
  :root:not([data-theme="light"]) textarea,
  :root:not([data-theme="light"]) input,
  :root:not([data-theme="light"]) select {
    background: rgba(24, 24, 26, 0.92);
  }

  :root:not([data-theme="light"]) pre {
    background: rgba(14, 14, 16, 0.9);
    color: #e6e6e8;
    border-color: rgba(255, 255, 255, 0.12);
  }

  :root:not([data-theme="light"]) th {
    background: rgba(255, 255, 255, 0.06);
  }

  :root:not([data-theme="light"]) tbody tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
  }
}

:root[data-theme="dark"] .btn.secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

:root[data-theme="dark"] .tag-list span {
  background: rgba(255, 255, 255, 0.04);
}

:root[data-theme="dark"] pre,
:root[data-theme="dark"] textarea,
:root[data-theme="dark"] input,
:root[data-theme="dark"] select {
  background: rgba(24, 24, 26, 0.92);
}

:root[data-theme="dark"] pre {
  background: rgba(14, 14, 16, 0.9);
  color: #e6e6e8;
  border-color: rgba(255, 255, 255, 0.12);
}

:root[data-theme="dark"] th {
  background: rgba(255, 255, 255, 0.06);
}

:root[data-theme="dark"] tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

label {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--subtext);
  font-weight: 500;
}

.status-ok {
  color: var(--ok);
  font-weight: 600;
}

.status-err {
  color: var(--danger);
  font-weight: 600;
}

@media (max-width: 900px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .container {
    width: min(1120px, 94vw);
    padding: 24px 0 36px;
  }

  .hero,
  .card,
  .panel {
    padding: 20px;
    border-radius: 16px;
  }

  body.theme-pure .hero,
  body.theme-pure .card,
  body.theme-pure .panel {
    padding: 22px;
    border-radius: 12px;
  }

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

  .theme-toggle {
    right: 10px;
    top: 10px;
    padding: 9px 14px;
    font-size: 12px;
  }
}