:root {
  color-scheme: light;
  --bg: #f3f3f1;
  --bg-soft: #fafafa;
  --bg-elevated: #eeeeec;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --surface-muted: rgba(246, 246, 244, 0.86);
  --ink: #0a0a0a;
  --ink-soft: #303030;
  --ink-muted: #777777;
  --ink-faint: #a3a3a3;
  --border: rgba(10, 10, 10, 0.1);
  --border-strong: rgba(10, 10, 10, 0.2);
  --border-soft: rgba(10, 10, 10, 0.065);
  --shadow: 0 28px 80px -58px rgba(0, 0, 0, 0.55);
  --shadow-soft: 0 18px 46px -38px rgba(0, 0, 0, 0.42);
  --ring: 0 0 0 4px rgba(10, 10, 10, 0.08);
  --radius-2xl: 32px;
  --radius-xl: 26px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --container: 1088px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 50% -20%, rgba(255, 255, 255, 0.95), transparent 34rem),
    linear-gradient(rgba(10, 10, 10, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 10, 10, 0.02) 1px, transparent 1px),
    linear-gradient(180deg, #fbfbfa 0%, #f3f3f1 48%, #ececea 100%);
  background-size: auto, 44px 44px, 44px 44px, auto;
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--ink);
  color: #ffffff;
}

img {
  display: block;
}

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

button {
  cursor: pointer;
}

button:disabled {
  cursor: wait;
}

.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 500, "GRAD" 0, "opsz" 24;
}

.app-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  isolation: isolate;
}

.app-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.44), transparent) 50% 0 / min(980px, 92vw) 100% no-repeat,
    radial-gradient(circle at 22% 20%, rgba(0, 0, 0, 0.05), transparent 22rem),
    radial-gradient(circle at 78% 12%, rgba(255, 255, 255, 0.62), transparent 18rem);
  opacity: 0.82;
}

.page-glow {
  position: fixed;
  inset: auto;
  pointer-events: none;
  z-index: 0;
  border-radius: 999px;
  filter: blur(84px);
  opacity: 0.32;
}

.glow-one {
  top: 8rem;
  left: -8rem;
  width: 22rem;
  height: 22rem;
  background: rgba(255, 255, 255, 0.95);
}

.glow-two {
  right: -10rem;
  bottom: 8rem;
  width: 24rem;
  height: 24rem;
  background: rgba(0, 0, 0, 0.08);
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  padding-top: 14px;
  background: linear-gradient(180deg, rgba(243, 243, 241, 0.96), rgba(243, 243, 241, 0));
  border-bottom: 0;
}

.nav-inner {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 10px 12px 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 18px 54px -44px rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  position: relative;
  z-index: 1;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset, 0 12px 26px -22px rgba(0, 0, 0, 0.8);
}

.brand-name {
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.04rem;
  font-weight: 800;
  letter-spacing: -0.045em;
  color: var(--ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 1;
}

.nav-tabs,
.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: rgba(10, 10, 10, 0.035);
}

.language-switcher {
  gap: 2px;
  background: rgba(255, 255, 255, 0.64);
  color: var(--ink-muted);
}

.language-switcher .material-symbols-outlined {
  margin-left: 8px;
  font-size: 18px;
}

.tab-btn,
.lang-btn,
.btn-primary,
.btn-secondary {
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
}

.tab-btn,
.lang-btn {
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-muted);
  font-weight: 750;
  white-space: nowrap;
}

.tab-btn {
  min-height: 38px;
  padding: 0 17px;
  font-size: 0.92rem;
}

.lang-btn {
  min-width: 42px;
  height: 32px;
  padding: 0 10px;
  font-size: 0.78rem;
  letter-spacing: -0.01em;
}

.tab-btn:hover,
.lang-btn:hover,
.btn-primary:hover,
.btn-secondary:hover {
  transform: translateY(-1px);
}

.tab-btn:focus-visible,
.lang-btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.input-field:focus-visible,
.textarea-field:focus-visible,
select.input-field:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

.tab-btn.active,
.lang-btn.active {
  background: var(--ink);
  color: #ffffff;
  box-shadow: 0 14px 30px -23px rgba(0, 0, 0, 0.82);
}

.site-main {
  position: relative;
  z-index: 1;
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 148px 0 68px;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: grid;
  gap: 24px;
  animation: panel-rise 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.view-header {
  width: min(760px, 100%);
  margin: 0 auto 2px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 11px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink-muted);
  font-size: 0.69rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.view-header h1 {
  margin: 16px 0 0;
  font-family: Manrope, Inter, sans-serif;
  font-size: clamp(2.75rem, 7vw, 5.25rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.085em;
}

.view-header p {
  max-width: 560px;
  margin: 18px auto 0;
  color: var(--ink-muted);
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.75;
}

.surface-card.intro-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 20px;
  padding: 28px 30px;
  background: linear-gradient(145deg, rgba(12, 12, 12, 0.98), rgba(34, 34, 34, 0.92));
  color: #ffffff;
  box-shadow: 0 40px 120px -88px rgba(0, 0, 0, 0.9);
}

.surface-card.intro-hero:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(145deg, rgba(12, 12, 12, 0.98), rgba(34, 34, 34, 0.92));
  box-shadow: 0 44px 124px -90px rgba(0, 0, 0, 0.92);
}

.intro-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.14), transparent 22rem),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08), transparent 34%);
}

.intro-hero-head,
.intro-metrics {
  position: relative;
  z-index: 1;
}

.intro-hero-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.intro-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.intro-kicker {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.6;
  text-align: right;
}

.intro-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.intro-metric {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.intro-metric strong {
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.75rem;
  line-height: 1;
  letter-spacing: -0.08em;
}

.intro-metric span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.intro-note {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 720px;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.78;
}

.surface-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.surface-card:hover {
  transform: translateY(-2px);
  border-color: rgba(10, 10, 10, 0.14);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 34px 92px -62px rgba(0, 0, 0, 0.72);
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.highlight-card {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  min-height: 136px;
  padding: 22px;
}

.highlight-icon,
.tutorial-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-soft);
  border-radius: 15px;
  background: linear-gradient(180deg, #ffffff, #f4f4f2);
  color: var(--ink);
  box-shadow: 0 14px 30px -27px rgba(0, 0, 0, 0.65);
}

.highlight-icon .material-symbols-outlined,
.tutorial-icon .material-symbols-outlined {
  font-size: 22px;
}

.highlight-card h2,
.section-copy h2,
.tutorial-card h2,
.tutorial-lead h2,
.success-card h2 {
  margin: 0;
  font-family: Manrope, Inter, sans-serif;
  color: var(--ink);
  font-size: 1.17rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.045em;
}

.highlight-card p,
.section-copy p,
.helper-inline p,
.tutorial-lead p,
.lead-point span,
.success-card p {
  margin: 8px 0 0;
  color: var(--ink-muted);
  line-height: 1.68;
}

.flow-card {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.82);
}

.stepper {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 26px 30px 22px;
  border-bottom: 1px solid var(--border-soft);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(246, 246, 244, 0.58));
}

.stepper-line,
.step-progress {
  position: absolute;
  top: 44px;
  left: 56px;
  right: 56px;
  height: 1px;
  border-radius: 999px;
}

.stepper-line {
  background: rgba(10, 10, 10, 0.09);
}

.step-progress {
  width: 0%;
  background: var(--ink);
  transition: width 240ms cubic-bezier(0.22, 1, 0.36, 1);
}

.step-item {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.step-circle {
  width: 37px;
  height: 37px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #ffffff;
  color: var(--ink-muted);
  font-size: 0.82rem;
  font-weight: 850;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.step-label {
  max-width: 116px;
  color: var(--ink-faint);
  text-align: center;
  font-size: 0.66rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: color 180ms ease, opacity 180ms ease;
}

.step-item.active .step-circle,
.step-item.completed .step-circle {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
  box-shadow: 0 16px 34px -25px rgba(0, 0, 0, 0.9);
}

.step-item.active .step-circle {
  transform: scale(1.04);
}

.step-item.active .step-label,
.step-item.completed .step-label {
  color: var(--ink);
}

.flow-stage-bar {
  display: grid;
  gap: 12px;
  padding: 18px 30px 0;
}

.flow-stage-head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.flow-stage-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: rgba(10, 10, 10, 0.055);
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.flow-stage-line {
  flex: 1;
  height: 1px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(10, 10, 10, 0.12), rgba(10, 10, 10, 0));
}

.flow-stage-copy {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.flow-body {
  display: grid;
  gap: 20px;
  padding: 30px;
}

.notice-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
}

.danger-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(180deg, #111111, #0b0b0b);
  color: #ffffff;
  box-shadow: 0 24px 54px -44px rgba(0, 0, 0, 0.9);
}

.danger-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: #ffffff;
  opacity: 0.9;
}

.danger-card .material-symbols-outlined {
  font-size: 25px;
  color: #ffffff;
}

.notice-title {
  margin: 0 0 9px;
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.notice-list,
.tutorial-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 8px;
}

.notice-list li,
.tutorial-list li {
  color: inherit;
  line-height: 1.68;
}

.danger-card .notice-list li {
  color: rgba(255, 255, 255, 0.72);
}

.flow-step {
  display: none;
  gap: 18px;
}

.flow-step.active {
  display: grid;
}

.section-copy {
  max-width: 640px;
}

.stack-form,
.summary-card,
.summary-grid,
.results-toolbar,
.lookup-results,
.tutorial-grid,
.lead-points {
  display: grid;
  gap: 15px;
}

label {
  display: block;
}

.field-label {
  display: block;
  margin-bottom: 10px;
  color: var(--ink-muted);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.input-field,
.textarea-field,
select.input-field {
  width: 100%;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  padding: 16px 16px;
  outline: none;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.input-field:hover,
.textarea-field:hover,
select.input-field:hover {
  border-color: rgba(10, 10, 10, 0.14);
  background: #ffffff;
}

.input-field:focus,
.textarea-field:focus,
select.input-field:focus {
  border-color: var(--border-strong);
  background: #ffffff;
  box-shadow: var(--ring), 0 1px 0 rgba(255, 255, 255, 0.9) inset;
}

.input-field::placeholder,
.textarea-field::placeholder {
  color: #aaaaaa;
}

.textarea-field {
  min-height: 148px;
  resize: vertical;
  line-height: 1.7;
}

.tall-field {
  min-height: 204px;
}

.mono-field {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.93rem;
  letter-spacing: 0.005em;
}

.btn-primary,
.btn-secondary {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 850;
  letter-spacing: -0.015em;
  user-select: none;
}

.btn-primary {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #ffffff;
  box-shadow: 0 20px 40px -28px rgba(0, 0, 0, 0.82);
}

.btn-primary:hover {
  background: #000000;
}

.btn-secondary {
  border: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.btn-secondary:hover {
  border-color: var(--border);
  background: #ffffff;
}

.btn-primary:active,
.btn-secondary:active,
.tab-btn:active,
.lang-btn:active {
  transform: translateY(0) scale(0.99);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.is-loading {
  opacity: 0.68;
}

.is-loading {
  position: relative;
}

.button-row {
  display: flex;
  gap: 12px;
}

.button-row > * {
  flex: 1;
}

.helper-inline {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--ink-muted);
}

.helper-inline .material-symbols-outlined {
  margin-top: 2px;
  font-size: 19px;
  color: var(--ink);
}

.helper-inline p {
  margin-top: 0;
  font-size: 0.94rem;
}

.inline-status {
  display: none;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  font-size: 0.93rem;
  line-height: 1.65;
}

.inline-status.visible {
  display: grid;
}

.inline-status.success,
.inline-status.error {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--border-soft);
  box-shadow: 0 14px 34px -31px rgba(0, 0, 0, 0.55);
}

.inline-status.success {
  border-left: 3px solid var(--ink);
}

.inline-status.error {
  border-left: 3px solid #666666;
}

.inline-status-icon {
  margin-top: 2px;
  font-size: 19px;
  color: var(--ink);
}

.inline-status-text {
  min-width: 0;
}

.summary-card {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: rgba(10, 10, 10, 0.028);
}

.summary-group {
  display: grid;
  gap: 12px;
}

.summary-title {
  margin: 0;
  font-family: Manrope, Inter, sans-serif;
  font-size: 0.98rem;
  font-weight: 850;
  letter-spacing: -0.03em;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  min-height: 48px;
  padding: 13px 14px;
  border: 1px solid var(--border-soft);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.78);
}

.summary-row span {
  color: var(--ink-muted);
}

.summary-row strong {
  color: var(--ink);
  text-align: right;
  word-break: break-word;
}

.success-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #ffffff, #f5f5f3);
}

.success-icon {
  width: 54px;
  height: 54px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: var(--ink);
  color: #ffffff;
  box-shadow: 0 20px 40px -28px rgba(0, 0, 0, 0.85);
}

.result-spotlight {
  display: grid;
  gap: 12px;
}

.checker-card {
  padding: 28px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.note-chip,
.tutorial-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink-muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.compact-row {
  align-items: center;
  justify-content: space-between;
}

.compact-row button {
  flex: 0 0 auto;
}

.inline-hint,
.results-copy {
  color: var(--ink-muted);
  font-weight: 650;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat-box {
  padding: 18px 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.62);
  text-align: left;
}

.stat-box span {
  display: block;
  color: var(--ink-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stat-box strong {
  display: block;
  margin-top: 10px;
  font-family: Manrope, Inter, sans-serif;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.07em;
}

.hidden {
  display: none !important;
}

.results-toolbar {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.results-copy {
  color: var(--ink);
  font-weight: 720;
  letter-spacing: -0.01em;
}

.lookup-results {
  gap: 16px;
}

.lookup-empty {
  padding: 24px;
  border: 1px dashed rgba(10, 10, 10, 0.16);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.54);
}

.lookup-empty-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  font-size: 20px;
}

.lookup-empty strong {
  display: block;
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.12rem;
  letter-spacing: -0.04em;
}

.lookup-empty p {
  margin: 8px 0 0;
  color: var(--ink-muted);
  line-height: 1.7;
}

.lookup-group {
  display: grid;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.5);
}

.lookup-group-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.lookup-group-title {
  min-width: 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.lookup-group-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-soft);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  font-size: 20px;
}

.lookup-group-copy {
  display: grid;
  gap: 5px;
}

.lookup-group-copy strong {
  font-family: Manrope, Inter, sans-serif;
  font-size: 1rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.lookup-group-copy p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.lookup-group-count {
  min-width: 40px;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--ink);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 850;
}

.lookup-group-list {
  display: grid;
  gap: 10px;
}

.lookup-group.available .lookup-group-icon,
.lookup-group.available .lookup-group-count {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
}

.lookup-group.activating .lookup-group-icon,
.lookup-group.activated .lookup-group-icon {
  background: rgba(10, 10, 10, 0.055);
}

.lookup-group.error .lookup-group-icon,
.lookup-group.error .lookup-group-count {
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink);
}

.lookup-group.error .lookup-group-count {
  border: 1px solid var(--border-soft);
}

.lookup-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.lookup-item:hover {
  transform: translateY(-1px);
  border-color: var(--border);
  background: #ffffff;
}

.lookup-detail {
  min-width: 0;
  display: grid;
  gap: 6px;
}

.lookup-code {
  min-width: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.91rem;
  font-weight: 850;
  letter-spacing: 0.01em;
  word-break: break-all;
}

.lookup-meta {
  color: var(--ink-muted);
  font-size: 0.86rem;
}

.lookup-note {
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.55;
}

.lookup-badge {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 850;
  white-space: nowrap;
}

.lookup-badge.available {
  background: var(--ink);
  color: #ffffff;
}

.lookup-badge.activated,
.lookup-badge.activating {
  border-color: var(--border-soft);
  background: rgba(10, 10, 10, 0.055);
  color: var(--ink);
}

.lookup-badge.error {
  border-color: rgba(10, 10, 10, 0.16);
  background: rgba(255, 255, 255, 0.66);
  color: var(--ink-soft);
}

.tutorial-lead {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 18px;
  padding: 26px;
}

.tutorial-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
  gap: 16px;
}

.tutorial-lead-dark {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(12, 12, 12, 0.98), rgba(40, 40, 40, 0.92));
  color: #ffffff;
  box-shadow: 0 40px 120px -88px rgba(0, 0, 0, 0.9);
}

.tutorial-lead-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.16), transparent 20rem),
    linear-gradient(90deg, rgba(255, 255, 255, 0.1), transparent 36%);
}

.tutorial-lead-dark:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(145deg, rgba(12, 12, 12, 0.98), rgba(40, 40, 40, 0.92));
}

.tutorial-lead-dark .tutorial-lead-copy,
.tutorial-lead-dark .lead-points {
  position: relative;
  z-index: 1;
}

.tutorial-overline {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.tutorial-lead-dark h2,
.tutorial-lead-dark p,
.tutorial-lead-dark .lead-point span,
.tutorial-lead-dark .lead-point strong {
  color: #ffffff;
}

.tutorial-lead-dark h2 {
  margin-top: 16px;
}

.tutorial-lead-dark p {
  color: rgba(255, 255, 255, 0.76);
}

.tutorial-lead-note {
  max-width: 520px;
  font-size: 0.94rem;
}

.tutorial-lead-dark .lead-point {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
}

.tutorial-lead-dark .lead-point span {
  color: rgba(255, 255, 255, 0.72);
}

.tutorial-rail {
  display: grid;
  gap: 18px;
  padding: 24px;
}

.tutorial-rail-head {
  display: grid;
  gap: 12px;
}

.tutorial-rail-head h2 {
  margin: 0;
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.28rem;
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.tutorial-rail-head p {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.72;
}

.tutorial-rail .tutorial-overline {
  color: var(--ink-muted);
  background: rgba(10, 10, 10, 0.04);
}

.tutorial-rail-list {
  display: grid;
  gap: 14px;
}

.tutorial-rail-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0 0;
  border-top: 1px solid var(--border-soft);
}

.tutorial-rail-step:first-child {
  padding-top: 0;
  border-top: 0;
}

.tutorial-rail-step strong {
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.2rem;
  line-height: 1;
  letter-spacing: -0.06em;
}

.tutorial-rail-step div {
  display: grid;
  gap: 6px;
}

.tutorial-rail-step span {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.tutorial-rail-step p {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.66;
}

.tutorial-actions {
  display: flex;
  gap: 12px;
}

.tutorial-actions > * {
  flex: 1;
}

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

.lead-point {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
}

.lead-point strong {
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.42rem;
  line-height: 1;
  letter-spacing: -0.06em;
}

.lead-point span {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.92rem;
}

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

.tutorial-card {
  padding: 22px;
}

.tutorial-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.tutorial-tag {
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.tutorial-list {
  margin-top: 14px;
  color: var(--ink-muted);
}

.tutorial-list li::marker,
.notice-list li::marker {
  color: currentColor;
}

@keyframes panel-rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

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

@media (max-width: 1080px) {
  .highlight-grid,
  .lead-points {
    grid-template-columns: 1fr;
  }

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

  .tutorial-showcase,
  .tutorial-lead,
  .summary-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .site-nav {
    padding-top: 10px;
  }

  .nav-inner,
  .site-main {
    width: min(100% - 20px, 100%);
  }

  .nav-inner {
    align-items: stretch;
    flex-direction: column;
    padding: 12px;
    border-radius: 28px;
  }

  .brand-lockup {
    justify-content: center;
  }

  .nav-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 8px;
  }

  .nav-tabs,
  .language-switcher {
    justify-content: center;
    width: 100%;
  }

  .tab-btn {
    flex: 1 1 auto;
    min-width: 0;
    padding: 0 10px;
  }

  .language-switcher .material-symbols-outlined {
    margin-left: 0;
  }

  .site-main {
    padding-top: 188px;
    padding-bottom: 40px;
  }

  .view-panel.active {
    gap: 18px;
  }

  .view-header {
    text-align: left;
  }

  .view-header p {
    margin-left: 0;
  }

  .view-header h1 {
    font-size: clamp(2.25rem, 15vw, 4rem);
  }

  .intro-hero {
    padding: 20px 18px;
  }

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

  .intro-kicker {
    text-align: left;
  }

  .highlight-card {
    min-height: auto;
  }

  .stepper {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 18px;
    padding: 22px 18px;
  }

  .stepper-line,
  .step-progress {
    display: none;
  }

  .flow-body,
  .checker-card,
  .tutorial-lead,
  .tutorial-rail,
  .tutorial-card {
    padding: 18px;
  }

  .flow-stage-bar {
    padding: 16px 18px 0;
  }

  .button-row,
  .compact-row {
    flex-direction: column;
    align-items: stretch;
  }

  .compact-row button {
    width: 100%;
  }

  .results-toolbar,
  .lookup-item {
    grid-template-columns: 1fr;
  }

  .lookup-group-head {
    flex-direction: column;
    align-items: stretch;
  }

  .lookup-group-count {
    width: fit-content;
  }

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

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

  .tutorial-grid {
    grid-template-columns: 1fr;
  }

  .lookup-item {
    align-items: flex-start;
  }

  .lookup-badge {
    width: fit-content;
  }

  .tutorial-actions {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .site-main {
    padding-top: 196px;
  }

  .tab-btn {
    min-height: 36px;
    font-size: 0.86rem;
  }

  .view-header h1 {
    letter-spacing: -0.075em;
  }

  .intro-metrics {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .summary-row {
    flex-direction: column;
    gap: 6px;
  }

  .summary-row strong {
    text-align: left;
  }
}

.tutorial-lead-copy {
  align-self: center;
}

.stat-box.success,
.stat-box.primary,
.stat-box.danger {
  background: rgba(255, 255, 255, 0.7);
}

.stat-box.success strong,
.stat-box.primary strong,
.stat-box.danger strong {
  color: var(--ink);
}