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6);border-radius:var(--radius-lg);border-style:var(--tw-border-style);border-width:1px;border-color:var(--border);background-color:var(--surface);text-align:center;transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration));--tw-duration:.15s;flex-direction:column;min-height:200px;padding:4rem 3rem;transition-duration:.15s;display:flex}@media(max-width:480px){.review-card{padding:2rem 1.5rem}}.review-front{font-size:var(--text-2xl);line-height:var(--tw-leading,var(--text-2xl--line-height));--tw-leading:var(--leading-relaxed);line-height:var(--leading-relaxed);--tw-font-weight:var(--font-weight-bold);font-weight:var(--font-weight-bold)}.review-divider{margin-block:calc(var(--spacing) * 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0);font-family:var(--font-ui);color:var(--muted-text);background-color:#0000;border-style:none;font-family:Geist Mono Variable,ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,monospace;font-size:13px}.review-hint{margin-top:calc(var(--spacing) * 4);text-align:center;font-size:var(--text-xs);line-height:var(--tw-leading,var(--text-xs--line-height));color:var(--muted-text);opacity:.6}.progress-bar{margin-bottom:calc(var(--spacing) * 6);background-color:var(--border);border-radius:3.40282e38px;width:100%;height:3px;overflow:hidden}.progress-fill{background-color:var(--accent);border-radius:3.40282e38px;height:100%;transition:width .3s}.study-button-row{align-items:center;gap:calc(var(--spacing) * 3);flex-wrap:wrap;display:inline-flex}.study-active{color:var(--success);--tw-font-weight:var(--font-weight-semibold);font-size:15px;font-weight:var(--font-weight-semibold)}.spinner-label{align-items:center;gap:calc(var(--spacing) * 2);display:inline-flex}.spinner{animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.export-import-row{align-items:center;gap:calc(var(--spacing) * 3);font-family:var(--font-kr);flex-wrap:wrap;font-family:Pretendard Variable,Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;display:flex}#skip-to-content{z-index:50;background-color:var(--background);padding-inline:calc(var(--spacing) * 3);padding-block:calc(var(--spacing) * 2);color:var(--accent);--tw-backdrop-blur:blur(var(--blur-lg));-webkit-backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,);backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,);transition-property:all;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration));inset-inline-start:calc(var(--spacing) * 16);position:absolute;top:-100%}#skip-to-content:focus{top:calc(var(--spacing) * 4)}@media(prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@keyframes pulse{50%{opacity:.5}}