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color-mix(in oklch, oklch(22% .02 240) 6%, transparent), 0 2px 6px color-mix(in oklch, oklch(22% .02 240) 4%, transparent);--shadow-lg: 0 8px 32px color-mix(in oklch, oklch(22% .02 240) 8%, transparent), 0 4px 8px color-mix(in oklch, oklch(22% .02 240) 4%, transparent);--shadow-glow: 0 0 0 3px color-mix(in oklch, oklch(58% .16 145) 15%, transparent);--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--ease-spring-heavy: cubic-bezier(.5, 1.2, .3, 1.2);--duration-fast: .2s;--duration-normal: .3s;--duration-slow: .5s;--header-height: 64px;--content-max-width: 1200px;--color-header-bg: rgba(255,255,255,.85);--color-inverse-bg: oklch(22% .02 240);--color-inverse-fg: #fff;--select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23999' d='M6 8L1 3h10z'/%3E%3C/svg%3E")}[data-theme=dark]{--color-bg: oklch(14% .01 250);--color-surface: oklch(18% .012 250);--color-surface-hover: oklch(22% .015 250);--color-fg: oklch(92% .006 250);--color-text: oklch(88% .008 250);--color-text-secondary: oklch(62% .015 240);--color-text-muted: oklch(45% .02 240);--color-primary: oklch(65% .16 145);--color-primary-dark: oklch(56% .16 145);--color-primary-darker: oklch(47% .16 145);--color-primary-light: oklch(75% .12 145);--color-primary-bg: color-mix(in oklch, oklch(65% .16 145) 15%, transparent);--color-accent: oklch(65% .16 145);--color-accent-dark: oklch(56% .16 145);--color-accent-bg: color-mix(in oklch, oklch(65% .16 145) 12%, transparent);--color-border: oklch(28% .015 240);--color-border-light: oklch(22% .01 240);--color-success: oklch(58% .15 145);--color-success-bg: color-mix(in oklch, oklch(58% .15 145) 12%, transparent);--color-success-border: color-mix(in oklch, oklch(58% .15 145) 20%, transparent);--color-danger: oklch(58% .18 30);--color-danger-bg: color-mix(in oklch, oklch(58% .18 30) 12%, transparent);--color-danger-border: color-mix(in oklch, oklch(58% .18 30) 20%, transparent);--color-header-bg: rgba(14, 16, 20, .92);--color-inverse-bg: oklch(32% .015 250);--color-inverse-fg: oklch(92% .006 250);--select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");--shadow-sm: 0 1px 2px color-mix(in oklch, oklch(0% 0 0) 25%, transparent), 0 1px 4px color-mix(in oklch, oklch(0% 0 0) 20%, transparent);--shadow-md: 0 4px 12px color-mix(in oklch, oklch(0% 0 0) 30%, transparent), 0 2px 6px color-mix(in oklch, oklch(0% 0 0) 20%, transparent);--shadow-lg: 0 8px 32px color-mix(in oklch, oklch(0% 0 0) 35%, transparent), 0 4px 8px color-mix(in oklch, oklch(0% 0 0) 25%, transparent);--shadow-glow: 0 0 0 3px color-mix(in oklch, oklch(65% .16 145) 25%, 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var(--space-3);height:100%;display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:var(--space-1);font-family:var(--font-display);font-weight:700;font-size:var(--text-lg);letter-spacing:-.02em;color:var(--color-text);text-decoration:none}.logo:hover{text-decoration:none;opacity:.85}.logo-icon{width:var(--space-4);height:var(--space-4);border-radius:var(--radius-sm);background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.05rem;flex-shrink:0}.nav{display:flex;align-items:center;gap:var(--space-1)}.nav a{padding:var(--space-1) var(--space-2);font-size:var(--text-base);font-weight:500;color:var(--color-text-secondary);border-radius:var(--radius-sm);transition:background var(--duration-fast) var(--ease-out),color var(--duration-fast) var(--ease-out);text-decoration:none}.nav 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6px);right:0;z-index:200;min-width:200px;max-height:360px;overflow-y:auto;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .15s,visibility .15s,transform .15s}.lang-switcher.open .lang-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.lang-option{display:flex;align-items:center;gap:8px;width:100%;padding:10px 14px;background:none;border:none;cursor:pointer;text-align:left;font-family:var(--font-body);transition:background .1s}.lang-option:hover{background:var(--color-bg)}.lang-option[aria-selected=true]{background:var(--color-primary-bg)}.lang-option[aria-selected=true] 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