/* Eduku proposed design tokens v0.2.0. Only brand blues/white are source verified. */
:root {
 --eduku-blue-deep: #3462AC; --eduku-blue: #489BD5; --eduku-sky: #5EC4E4;
 --eduku-white: #FFFFFF; --eduku-ink: #132E43; --eduku-muted: #536775;
 --eduku-page: #FFFFFF; --eduku-subtle: #F6F9FC; --eduku-pale: #EAF4F8;
 --eduku-border: #D9E5EC; --eduku-control-border: #6E8190;
 --eduku-action: #3462AC; --eduku-action-hover: #28508F; --eduku-action-pressed: #1F4074;
 --eduku-focus: #132E43; --eduku-accent: #D66B4B; --eduku-accent-surface: #FFF1EB; --eduku-accent-text: #A54025;
 --eduku-success: #1F6D62; --eduku-success-surface: #ECF8F4;
 --eduku-warning: #76510B; --eduku-warning-surface: #FFF8DE;
 --eduku-error: #A93232; --eduku-error-surface: #FFF0F0;
 --eduku-space-1: 4px; --eduku-space-2: 8px; --eduku-space-3: 12px; --eduku-space-4: 16px;
 --eduku-space-6: 24px; --eduku-space-8: 32px; --eduku-space-12: 48px; --eduku-space-16: 64px; --eduku-space-24: 96px;
 --eduku-radius-control: 8px; --eduku-radius-card: 16px; --eduku-radius-feature: 24px;
 --eduku-font: 'Eduku Noto', 'Noto Sans', sans-serif; --eduku-display-weight: 900; --eduku-body-weight: 400; --eduku-icon-stroke: 1.5;
 --eduku-duration: 180ms; --eduku-ease: cubic-bezier(.2,0,0,1);
}
:lang(th) { font-family: 'Eduku Thai', 'Kanit', sans-serif; line-height: 1.75; letter-spacing: normal; }
:lang(zh-Hans) { font-family: 'Eduku SC', 'Noto Sans CJK SC', sans-serif; line-height: 1.75; letter-spacing: normal; }
:lang(ja) { font-family: 'Eduku JP', 'Noto Sans CJK JP', sans-serif; line-height: 1.75; letter-spacing: normal; }
[data-accent="marigold"] { --eduku-accent: #E9B949; --eduku-accent-surface: #FFF8DE; --eduku-accent-text: #76510B; }
[data-accent="mint"] { --eduku-accent: #4EA99A; --eduku-accent-surface: #ECF8F4; --eduku-accent-text: #1F6D62; }
h1:lang(zh-Hans), h2:lang(zh-Hans), h3:lang(zh-Hans), h1:lang(ja), h2:lang(ja), h3:lang(ja) { font-weight: 700; }
:focus-visible { outline: 3px solid var(--eduku-focus); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { :root { --eduku-duration: 0ms; } }