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components;@layer utilities{.visible{visibility:visible}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.isolate{isolation:isolate}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.inline-block{display:inline-block}.inline-flex{display:inline-flex}.resize{resize:both}.border{border-style:var(--tw-border-style);border-width:1px}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.italic{font-style:italic}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) 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serif;--font-body:"Noto Serif JP", "Hiragino Mincho ProN", Georgia, serif;--font-mono:"JetBrains Mono", "SF Mono", monospace;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--border-subtle:1px solid #0000000f;--border-medium:1px solid #0000001a;--shadow-xs:0 1px 2px #00000008;--shadow-sm:0 2px 6px #0000000d;--shadow-md:0 4px 16px #00000012;--shadow-lg:0 8px 32px #0000001a;--ease:cubic-bezier(.4, 0, .2, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1);--dur-fast:.15s;--dur-normal:.25s;--dur-slow:.4s;--sidebar-width:380px;--topbar-height:48px}[data-theme=dark]{--washi-white:#111;--washi-cream:#1a1a1a;--washi-warm:#242424;--sumi-deep:#e0dcd4;--sumi-medium:#a8a49c;--sumi-light:#6e6a64;--ai:#5b9bd5;--beni:#d4786e;--moegi:#7fa87a;--kitsune:#d4975a;--murasaki:#a48bbd;--ai-light:#5b9bd514;--ai-medium:#5b9bd52e;--beni-light:#d4786e14;--moegi-light:#7fa87a1a;--moegi-medium:#7fa87a33;--kitsune-light:#d4975a1a;--border-subtle:1px solid #ffffff0d;--border-medium:1px solid #ffffff14;--shadow-xs:0 1px 2px #00000026;--shadow-sm:0 2px 6px #0003;--shadow-md:0 4px 16px #00000040;--shadow-lg:0 8px 32px #00000059}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-body);background:var(--washi-white);color:var(--sumi-deep);-webkit-font-smoothing:antialiased;font-size:14px;line-height:1.5;overflow:hidden}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--sumi-light);opacity:.4;border-radius:2px}::-webkit-scrollbar-thumb:hover{background:var(--sumi-medium)}.topbar{height:var(--topbar-height);-webkit-backdrop-filter:blur(16px)saturate(1.2);border-bottom:var(--border-subtle);z-index:50;background:#f5f2ebd1}[data-theme=dark] .topbar{background:#111111d1}.mode-switcher{border-radius:var(--radius-md);background:var(--washi-warm);gap:2px;padding:2px;display:flex}.mode-switcher 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solid var(--moegi);color:var(--moegi);border-radius:var(--radius-md);text-align:center;animation:feedbackIn .3s var(--ease-spring);padding:8px 16px;font-size:13px;font-weight:500}.feedback-wrong{background:var(--beni-light);border:1px solid var(--beni);color:var(--beni);border-radius:var(--radius-md);text-align:center;animation:feedbackIn .3s var(--ease-spring);padding:8px 16px;font-size:13px;font-weight:500}@keyframes feedbackIn{0%{opacity:0;transform:translateY(4px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}.explore-drawer{background:var(--washi-cream);border-left:var(--border-subtle);overflow-y:auto}.explore-section-title{text-transform:uppercase;letter-spacing:1px;color:var(--sumi-light);margin-bottom:6px;font-size:11px;font-weight:600}.exam-tip{background:var(--kitsune-light);border:1px solid var(--kitsune);border-radius:var(--radius-md);padding:10px 14px;font-size:12px;line-height:1.5}.progress-strip{background:var(--washi-warm);border-radius:2px;flex-shrink:0;height:3px;overflow:hidden}.progress-strip-fill{background:var(--ai);height:100%;transition:width .4s var(--ease);border-radius:2px}@keyframes spin{to{transform:rotate(360deg)}}.loading-spinner{border:2px solid var(--washi-warm);border-top:2px solid var(--ai);border-radius:50%;width:28px;height:28px;animation:.9s linear infinite spin}.score-display{font-family:var(--font-mono);color:var(--ai);letter-spacing:-2px;font-size:48px;font-weight:300;line-height:1}.explanation-card{border-radius:var(--radius-sm);border:var(--border-subtle);background:var(--washi-white);animation:feedbackIn .25s var(--ease);padding:6px 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0;border:none;outline:none;flex:1;min-width:0;font-size:12px}.search-input::placeholder{color:var(--sumi-light)}.region-list-item{width:100%;font-family:var(--font-body);color:var(--sumi-medium);border-radius:var(--radius-sm);cursor:pointer;text-align:left;transition:all var(--dur-fast) var(--ease);background:0 0;border:1px solid #0000;align-items:center;gap:8px;padding:5px 8px;font-size:12px;display:flex}.region-list-item:hover{background:var(--ai-light);color:var(--sumi-deep)}.region-list-item.active{background:var(--ai-medium);color:var(--ai);border-color:var(--ai);font-weight:500}.region-dot{border:1px solid #0000001a;border-radius:50%;flex-shrink:0;width:8px;height:8px}[data-theme=dark] .region-dot{border-color:#ffffff1a}.bottom-drawer{border-radius:var(--radius-lg) var(--radius-lg) 0 0}[data-theme=dark] .bottom-drawer{box-shadow:0 -4px 20px #0000004d}.sheet-backdrop{z-index:90;opacity:0;pointer-events:none;transition:opacity var(--dur-normal) var(--ease);background:#0006;position:fixed;inset:0}.sheet-backdrop-visible{opacity:1;pointer-events:auto}.mobile-bottom-sheet{background:var(--washi-cream);border-radius:var(--radius-xl) var(--radius-xl) 0 0;z-index:100;max-height:70vh;transition:transform var(--dur-slow) var(--ease);flex-direction:column;display:flex;position:fixed;bottom:0;left:0;right:0;transform:translateY(100%);box-shadow:0 -4px 24px #0000001f}.mobile-bottom-sheet-open{transform:translateY(0)}.sheet-handle{cursor:pointer;flex-shrink:0;justify-content:center;padding:10px 0 6px;display:flex}.sheet-handle-bar{background:var(--sumi-light);opacity:.5;border-radius:2px;width:36px;height:4px}.sheet-content{flex:1;min-height:0;overflow-y:auto}.mobile-panel-fab{background:var(--ai);color:#f5f2eb;cursor:pointer;width:48px;height:48px;box-shadow:var(--shadow-md);z-index:80;transition:all var(--dur-normal) var(--ease);border:none;border-radius:50%;justify-content:center;align-items:center;display:flex;position:fixed;bottom:20px;right:20px}.mobile-panel-fab:active{transform:scale(.92)}[data-theme=dark] .mobile-panel-fab{color:#111}[data-theme=dark] .mobile-bottom-sheet{box-shadow:0 -4px 24px #0006}@media (max-width:767px){:root{--sidebar-width:100%}.sidebar{display:none}.topbar{padding:0 10px}.app-title{font-size:14px!important}.quiz-option{min-height:44px}.mode-switcher button{min-height:36px;padding:6px 14px}.region-list-item{min-height:44px;padding:8px 10px}.theme-toggle{width:40px;height:40px}.btn{min-height:44px}.viewer-overlay-btn{width:40px;height:40px}.setup-card{padding:var(--ma-3)}.score-display{font-size:36px}}@media (min-width:768px) and (max-width:1023px){:root{--sidebar-width:320px}.sidebar.left-panel{display:none}.quiz-option{min-height:40px}.region-list-item{min-height:40px;padding:6px 10px}.btn{min-height:40px}}@media (min-width:1024px){.mobile-panel-fab,.sheet-backdrop,.mobile-bottom-sheet{display:none!important}}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@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}