*{margin:0;padding:0;box-sizing:border-box}:root{--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 15px;--font-size-lg: 18px;--font-size-xl: 24px;--font-size-2xl: 32px;--font-size-3xl: 48px;--font-size-4xl: 64px;--font-size-5xl: 96px;--color-bg: #faf7f2;--color-text: #1a1611;--color-text-light: #3c2a21;--color-text-muted: #6b5b73;--color-text-subtle: #9b8c8c;--color-border: #d4c4b0;--color-accent: #8b4513;--color-input-bg: rgba(255, 255, 255, .6);--color-input-bg-focus: rgba(255, 255, 255, .9);--color-current-word-bg: rgba(139, 69, 19, .1);--color-current-word-bg-mid: rgba(139, 69, 19, .15);--color-control-bg: rgba(26, 22, 17, .8);--color-control-bg-hover: rgba(26, 22, 17, .95);--color-control-text: #faf7f2;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--space-4xl: 96px;--grid-margin: clamp(20px, 5vw, 80px);--content-width: min(1200px, calc(100vw - 2 * var(--grid-margin)))}body.dark-mode{--color-bg: 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768px){.settings-bar{flex-direction:column;align-items:stretch}.start-button{width:100%;text-align:center}.reading-mode-container{padding:var(--space-2xl) var(--space-md)}}@media (max-width: 480px){.title{font-size:var(--font-size-3xl)}.controls-hint{flex-direction:column;gap:var(--space-sm)}.input-tabs{flex-direction:column}.file-info{flex-direction:column;align-items:flex-start;gap:var(--space-sm)}.clear-file{align-self:flex-end;margin:0}}