:root {
  --font-sans: Inter, "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --color-bg: #0b1220;
  --color-bg-elevated: #10192b;
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-surface-strong: rgba(255, 255, 255, 0.1);
  --color-border: rgba(255, 255, 255, 0.12);
  --color-text: #e8eef8;
  --color-text-muted: rgba(232, 238, 248, 0.72);
  --color-text-faint: rgba(232, 238, 248, 0.56);
  --color-primary: #79a8ff;
  --color-primary-strong: #9ec3ff;
  --color-danger: #ff8b8b;
  --color-warning: #ffd38a;
  --color-success: #84e2b6;
  --shadow-1: 0 10px 30px rgba(0, 0, 0, 0.22);
  --shadow-2: 0 20px 60px rgba(0, 0, 0, 0.34);
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-round: 999px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --header-height: 64px;
  --container-max: 1280px;
  --scrollbar-thumb: rgba(121, 168, 255, 0.46);
  --scrollbar-thumb-hover: rgba(158, 195, 255, 0.62);
  --scrollbar-thumb-active: rgba(158, 195, 255, 0.78);
}

:root[data-theme="light"] {
  --color-bg: #f4f7fb;
  --color-bg-elevated: #ffffff;
  --color-surface: rgba(15, 23, 42, 0.04);
  --color-surface-strong: rgba(15, 23, 42, 0.08);
  --color-border: rgba(15, 23, 42, 0.12);
  --color-text: #142033;
  --color-text-muted: rgba(20, 32, 51, 0.72);
  --color-text-faint: rgba(20, 32, 51, 0.54);
  --shadow-1: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-2: 0 20px 60px rgba(15, 23, 42, 0.14);
  --scrollbar-thumb: rgba(59, 130, 246, 0.36);
  --scrollbar-thumb-hover: rgba(37, 99, 235, 0.5);
  --scrollbar-thumb-active: rgba(37, 99, 235, 0.62);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f4f7fb;
    --color-bg-elevated: #ffffff;
    --color-surface: rgba(15, 23, 42, 0.04);
    --color-surface-strong: rgba(15, 23, 42, 0.08);
    --color-border: rgba(15, 23, 42, 0.12);
    --color-text: #142033;
    --color-text-muted: rgba(20, 32, 51, 0.72);
    --color-text-faint: rgba(20, 32, 51, 0.54);
    --shadow-1: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-2: 0 20px 60px rgba(15, 23, 42, 0.14);
    --scrollbar-thumb: rgba(59, 130, 246, 0.36);
    --scrollbar-thumb-hover: rgba(37, 99, 235, 0.5);
    --scrollbar-thumb-active: rgba(37, 99, 235, 0.62);
  }
}

/* ── Global scrollbar theming ───────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
  background: transparent;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

::-webkit-scrollbar-thumb:active {
  background: var(--scrollbar-thumb-active);
}

::-webkit-scrollbar-corner {
  background: transparent;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

/* Custom scrollbar targets hide native scrollbars (overrides above) */
html.app-custom-scrollbar-window,
html.app-custom-scrollbar-window body,
.app-custom-scrollbar-target {
  scrollbar-width: none !important;
}

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

html {
  min-height: 100%;
  font-size: 16px;
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  html:not([data-theme]) {
    color-scheme: light;
  }
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: var(--font-sans);
  line-height: 1.5;
  background: var(--color-bg);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}


html.app-custom-scrollbar-window::-webkit-scrollbar,
html.app-custom-scrollbar-window body::-webkit-scrollbar,
.app-custom-scrollbar-target::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

body.is-custom-scrollbar-dragging {
  user-select: none;
  cursor: ns-resize;
}

.app-custom-scrollbar {
  position: fixed;
  z-index: 1400;
  border-radius: 999px;
  background: transparent;
  opacity: 1;
  transition: opacity 160ms ease;
}

.app-custom-scrollbar.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.app-custom-scrollbar__thumb {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 36px;
  border-radius: 999px;
  background: var(--scrollbar-thumb);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04), 0 6px 14px rgba(15, 23, 42, 0.2);
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.app-custom-scrollbar:hover .app-custom-scrollbar__thumb,
.app-custom-scrollbar__thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

.app-custom-scrollbar__thumb:active {
  background: var(--scrollbar-thumb-active);
}

img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}

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

button {
  border: 0;
  background: transparent;
  padding: 0;
}

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

ul,
ol,
dl {
  margin: 0;
  padding: 0;
}

dt,
dd {
  margin: 0;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
}

[hidden] {
  display: none !important;
}

.app-page {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
}

.app-container {
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
}

.app-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  border: 0;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.app-stack {
  display: grid;
  gap: var(--space-4);
}

.app-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.app-muted {
  color: var(--color-text-muted);
}

.app-faint {
  color: var(--color-text-faint);
}

.app-mono {
  font-family: var(--font-mono);
}