:root {
  /* Color tokens */
  --ar-color-bg: #f7f9fc;
  --ar-color-bg-alt: #f3f6fb;
  --ar-color-surface: #ffffff;
  --ar-color-surface-muted: #f8fbff;
  --ar-color-text-primary: #0d171b;
  --ar-color-text-secondary: #3d5268;
  --ar-color-text-muted: #6b8096;
  --ar-color-border: #d8e3f0;
  --ar-color-border-strong: #b9cbdf;
  --ar-color-brand: #137fec;
  --ar-color-brand-strong: #0b63c4;
  --ar-color-success: #0b7a56;
  --ar-color-warning: #9a7611;
  --ar-color-danger: #af2f2f;

  /* Typography tokens */
  --ar-font-body: 'Manrope', 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  --ar-font-display: 'Manrope', 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  --ar-type-display: clamp(2.2rem, 5vw, 3.1rem);
  --ar-type-h1: clamp(1.8rem, 3.6vw, 2.5rem);
  --ar-type-h2: clamp(1.35rem, 2.2vw, 1.85rem);
  --ar-type-body: 1rem;
  --ar-type-caption: 0.8125rem;

  /* Spacing tokens */
  --ar-space-4: 4px;
  --ar-space-8: 8px;
  --ar-space-12: 12px;
  --ar-space-16: 16px;
  --ar-space-24: 24px;
  --ar-space-32: 32px;
  --ar-space-48: 48px;
  --ar-space-64: 64px;

  /* Radius tokens */
  --ar-radius-8: 8px;
  --ar-radius-12: 12px;
  --ar-radius-16: 16px;
  --ar-radius-24: 24px;

  /* Shadow tokens */
  --ar-shadow-sm: 0 8px 20px rgba(11, 34, 63, 0.08);
  --ar-shadow-md: 0 16px 34px rgba(11, 34, 63, 0.1);
  --ar-shadow-lg: 0 26px 52px rgba(11, 34, 63, 0.14);

  /* Motion tokens */
  --ar-motion-fast: 160ms;
  --ar-motion-base: 220ms;
  --ar-motion-slow: 320ms;

  /* Layout tokens */
  --ar-layout-content-max: 1360px;
  --ar-gutter-desktop: 2rem;
  --ar-gutter-mobile: 1rem;

  /* Legacy aliases (keep existing pages stable) */
  --ar-content-max: var(--ar-layout-content-max);
  --ar-bg-start: var(--ar-color-bg);
  --ar-bg-end: var(--ar-color-bg-alt);
  --ar-ink-900: var(--ar-color-text-primary);
  --ar-ink-700: var(--ar-color-text-secondary);
  --ar-border: var(--ar-color-border);
  --ar-accent: var(--ar-color-brand);
  --ar-accent-deep: var(--ar-color-brand-strong);
}

body[data-ar-shell='premium'] {
  margin: 0;
  font-family: var(--ar-font-body);
  color: var(--ar-color-text-primary);
  background:
    radial-gradient(circle at 8% 8%, rgba(19, 127, 236, 0.09), transparent 34%),
    radial-gradient(circle at 94% 4%, rgba(245, 162, 70, 0.09), transparent 36%),
    linear-gradient(180deg, var(--ar-bg-start) 0%, var(--ar-bg-end) 100%);
}

body[data-ar-shell='premium'] h1,
body[data-ar-shell='premium'] h2,
body[data-ar-shell='premium'] h3,
body[data-ar-shell='premium'] h4,
body[data-ar-shell='premium'] h5,
body[data-ar-shell='premium'] h6 {
  margin: 0;
  font-family: var(--ar-font-display);
  letter-spacing: -0.015em;
  color: var(--ar-color-text-primary);
}

body[data-ar-shell='premium'] h1 {
  font-size: var(--ar-type-h1);
  line-height: 1.15;
}

body[data-ar-shell='premium'] h2 {
  font-size: var(--ar-type-h2);
  line-height: 1.2;
}

body[data-ar-shell='premium'] p,
body[data-ar-shell='premium'] li,
body[data-ar-shell='premium'] input,
body[data-ar-shell='premium'] textarea,
body[data-ar-shell='premium'] button {
  font-size: var(--ar-type-body);
}

body[data-ar-shell='premium'] :where(a, button, input, textarea, select):focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(19, 127, 236, 0.22);
}

body[data-ar-shell='premium'] [data-ar-header='premium'] {
  border-bottom-color: rgba(176, 197, 226, 0.62) !important;
  background: rgba(252, 254, 255, 0.82) !important;
  backdrop-filter: blur(14px);
  padding-left: clamp(var(--ar-gutter-mobile), 3vw, var(--ar-gutter-desktop)) !important;
  padding-right: clamp(var(--ar-gutter-mobile), 3vw, var(--ar-gutter-desktop)) !important;
}

body[data-ar-shell='premium'] [data-ar-header='premium'] [data-brand-link] {
  color: var(--ar-color-text-primary) !important;
  text-decoration: none;
}

body[data-ar-shell='premium'] [data-ar-header='premium'] [data-brand-link]:hover {
  color: var(--ar-color-brand) !important;
}

[data-ar-container='true'] {
  width: 100%;
  max-width: var(--ar-content-max) !important;
  margin-left: auto;
  margin-right: auto;
}

body[data-ar-shell='premium'] [data-ar-main='premium'] {
  padding-left: clamp(var(--ar-gutter-mobile), 3vw, var(--ar-gutter-desktop)) !important;
  padding-right: clamp(var(--ar-gutter-mobile), 3vw, var(--ar-gutter-desktop)) !important;
}

body[data-ar-shell='premium'] [data-ar-surface='true'] {
  border: 1px solid var(--ar-color-border) !important;
  border-radius: var(--ar-radius-16) !important;
  background: rgba(255, 255, 255, 0.95) !important;
  box-shadow: var(--ar-shadow-md);
  transition:
    border-color var(--ar-motion-base) ease,
    box-shadow var(--ar-motion-base) ease,
    transform var(--ar-motion-fast) ease;
}

body[data-ar-shell='premium'] [data-ar-surface='true']:hover {
  border-color: var(--ar-color-border-strong) !important;
  box-shadow: var(--ar-shadow-lg);
}

body[data-ar-shell='premium'] [data-nav-primary-action] {
  background: linear-gradient(136deg, var(--ar-color-brand), var(--ar-color-brand-strong)) !important;
  border: 0 !important;
}

body[data-ar-shell='premium'] [data-nav-primary-action]:hover {
  filter: brightness(1.03);
}

body[data-ar-shell='premium'] [data-ar-button] {
  height: 48px;
  border-radius: var(--ar-radius-12);
  border: 1px solid transparent;
  padding: 0 var(--ar-space-16);
  font-size: var(--ar-type-body);
  font-weight: 700;
  line-height: 1;
  transition:
    transform var(--ar-motion-fast) ease,
    box-shadow var(--ar-motion-fast) ease,
    background-color var(--ar-motion-base) ease,
    border-color var(--ar-motion-base) ease,
    color var(--ar-motion-base) ease;
}

body[data-ar-shell='premium'] [data-ar-button][data-variant='primary'] {
  background: linear-gradient(136deg, var(--ar-color-brand), var(--ar-color-brand-strong));
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(19, 127, 236, 0.24);
}

body[data-ar-shell='premium'] [data-ar-button][data-variant='primary']:hover {
  filter: brightness(1.04);
  transform: translateY(-1px);
}

body[data-ar-shell='premium'] [data-ar-button][data-variant='secondary'] {
  border-color: var(--ar-color-border);
  background: #ffffff;
  color: var(--ar-color-text-primary);
  box-shadow: var(--ar-shadow-sm);
}

body[data-ar-shell='premium'] [data-ar-button][data-variant='secondary']:hover {
  border-color: var(--ar-color-border-strong);
  background: var(--ar-color-surface-muted);
}

body[data-ar-shell='premium'] [data-ar-button][data-variant='ghost'],
body[data-ar-shell='premium'] [data-lang-switch] {
  height: 32px;
  border-radius: var(--ar-radius-8);
  border: 1px solid var(--ar-color-border);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ar-color-text-secondary);
  padding: 0 var(--ar-space-12);
  font-size: var(--ar-type-caption);
  font-weight: 700;
  box-shadow: none;
}

body[data-ar-shell='premium'] [data-ar-button][aria-busy='true'],
body[data-ar-shell='premium'] [data-ar-button]:disabled {
  cursor: not-allowed;
  opacity: 0.72;
  transform: none;
  box-shadow: none;
}

body[data-ar-shell='premium'] [data-ar-input] {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--ar-color-border-strong);
  border-radius: var(--ar-radius-12);
  background: rgba(255, 255, 255, 0.88);
  color: var(--ar-color-text-primary);
  padding: var(--ar-space-12) var(--ar-space-16);
  font-size: var(--ar-type-body);
  line-height: 1.4;
  transition:
    border-color var(--ar-motion-fast) ease,
    box-shadow var(--ar-motion-fast) ease,
    background-color var(--ar-motion-base) ease;
}

body[data-ar-shell='premium'] [data-ar-input]::placeholder {
  color: var(--ar-color-text-muted);
}

body[data-ar-shell='premium'] [data-ar-input]:focus {
  outline: none;
  border-color: var(--ar-color-brand);
  box-shadow: 0 0 0 4px rgba(19, 127, 236, 0.14);
}

body[data-ar-shell='premium'] [data-ar-input][aria-invalid='true'] {
  border-color: var(--ar-color-danger);
  box-shadow: 0 0 0 4px rgba(175, 47, 47, 0.12);
}

body[data-ar-shell='premium'] [data-ar-input]:disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

body[data-ar-shell='premium'] [data-nav-login].is-hidden {
  display: none !important;
}

body[data-ar-shell='premium'] [data-nav-logout].is-hidden {
  display: none !important;
}

body[data-ar-shell='premium'] footer [data-ar-container='true'] {
  padding-left: clamp(var(--ar-gutter-mobile), 3vw, var(--ar-gutter-desktop)) !important;
  padding-right: clamp(var(--ar-gutter-mobile), 3vw, var(--ar-gutter-desktop)) !important;
}

/* Keep icon footprint stable while webfont swaps in to reduce CLS. */
body[data-ar-shell='premium'] .material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 1em;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  min-width: 1em;
  max-width: 1em;
  height: 1em;
  overflow: hidden;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'liga';
}

@media (max-width: 900px) {
  body[data-ar-shell='premium'] [data-ar-header='premium'] [data-nav-primary-action] {
    min-width: 92px;
    padding-left: 14px !important;
    padding-right: 14px !important;
  }
}