@import"https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700&family=Noto+Sans+JP:wght@300;400;500;700&family=Zen+Maru+Gothic:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap";*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}body{min-height:100dvh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none}a{color:inherit;text-decoration:none}ul,ol{list-style:none}p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}#root{isolation:isolate;min-height:100dvh}:root{--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--radius-xs: 6px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-2xl: 24px;--radius-full: 9999px;--shadow-sm: 0 1px 2px oklch(0 0 0 / .08);--shadow-md: 0 4px 12px oklch(0 0 0 / .12);--shadow-lg: 0 8px 24px oklch(0 0 0 / .16);--shadow-xl: 0 12px 40px oklch(0 0 0 / .24);--shadow-glow: 0 0 20px oklch(.55 .12 245 / .3);--ease-out-expo: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--ease-gentle: cubic-bezier(.25, .1, .25, 1);--duration-fast: .12s;--duration-normal: .25s;--duration-slow: .4s;--sidebar-width: 260px;--header-height: 64px;--mobile-nav-height: 72px}:root,[data-theme=sumi-ai]{--color-bg-primary: oklch(.16 .015 250);--color-bg-secondary: oklch(.2 .015 250);--color-bg-tertiary: oklch(.24 .015 250);--color-bg-elevated: oklch(.28 .015 250);--color-text-primary: oklch(.9 .01 60);--color-text-secondary: oklch(.65 .015 250);--color-text-muted: oklch(.48 .01 250);--color-primary: oklch(.55 .12 245);--color-primary-light: oklch(.65 .1 245);--color-primary-muted: oklch(.4 .06 245);--color-accent: oklch(.62 .18 35);--color-accent-light: oklch(.72 .14 35);--color-success: oklch(.65 .15 155);--color-error: oklch(.58 .18 20);--color-warning: oklch(.75 .15 75);--color-border: oklch(.32 .015 250);--color-border-light: oklch(.38 .015 250);--color-glass-bg: oklch(.22 .015 250 / .5);--color-glass-border: oklch(.4 .02 250 / .15);--theme-name: "墨藍 (Sumi-Ai)"}[data-theme=fukami]{--color-bg-primary: oklch(.14 .02 150);--color-bg-secondary: oklch(.18 .02 150);--color-bg-tertiary: oklch(.22 .02 150);--color-bg-elevated: oklch(.26 .02 150);--color-text-primary: oklch(.92 .01 90);--color-text-secondary: oklch(.65 .02 150);--color-text-muted: oklch(.48 .015 150);--color-primary: oklch(.6 .14 155);--color-primary-light: oklch(.7 .12 155);--color-primary-muted: oklch(.42 .06 155);--color-accent: oklch(.7 .15 70);--color-accent-light: oklch(.78 .12 70);--color-success: oklch(.65 .15 155);--color-error: oklch(.6 .18 25);--color-warning: oklch(.75 .15 75);--color-border: oklch(.3 .02 150);--color-border-light: oklch(.36 .02 150);--color-glass-bg: oklch(.2 .02 150 / .5);--color-glass-border: oklch(.38 .025 150 / .15);--theme-name: "深森 (Fukami)"}[data-theme=tsukishiro]{--color-bg-primary: oklch(.97 .005 60);--color-bg-secondary: oklch(.94 .005 60);--color-bg-tertiary: oklch(.91 .005 60);--color-bg-elevated: oklch(.99 .003 60);--color-text-primary: oklch(.18 .015 250);--color-text-secondary: oklch(.4 .015 250);--color-text-muted: oklch(.55 .01 250);--color-primary: oklch(.45 .14 245);--color-primary-light: oklch(.55 .12 245);--color-primary-muted: oklch(.75 .06 245);--color-accent: oklch(.55 .18 35);--color-accent-light: oklch(.65 .14 35);--color-success: oklch(.5 .15 155);--color-error: oklch(.5 .18 20);--color-warning: oklch(.6 .15 75);--color-border: oklch(.85 .005 250);--color-border-light: oklch(.88 .005 250);--color-glass-bg: oklch(.98 .005 60 / .7);--color-glass-border: oklch(.8 .01 250 / .2);--theme-name: "月白 (Tsukishiro)"}:root{--font-heading: "Zen Kaku Gothic New", sans-serif;--font-body: "Noto Sans JP", sans-serif;--font-accent: "Zen Maru Gothic", sans-serif;--font-mono: "JetBrains Mono", monospace}body{font-family:var(--font-body);font-size:15px;font-weight:400;color:var(--color-text-primary);background-color:var(--color-bg-primary);letter-spacing:-.01em}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;letter-spacing:.02em;line-height:1.3;color:var(--color-text-primary)}h1{font-size:1.75rem}h2{font-size:1.375rem}h3{font-size:1.125rem}h4{font-size:1rem}.text-sm{font-size:.8125rem}.text-xs{font-size:.75rem}.text-lg{font-size:1.125rem}.text-xl{font-size:1.375rem}.text-muted{color:var(--color-text-muted)}.text-secondary{color:var(--color-text-secondary)}.font-accent{font-family:var(--font-accent);font-weight:500}.font-mono{font-family:var(--font-mono);font-weight:500}@keyframes correctPulse{0%{transform:scale(1)}30%{transform:scale(1.03)}60%{transform:scale(.99)}to{transform:scale(1)}}@keyframes incorrectShake{0%,to{transform:translate(0)}20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-3px)}80%{transform:translate(2px)}}@keyframes xpFloat{0%{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-40px) scale(1.2)}}@keyframes levelUpBurst{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.05);opacity:1}to{transform:scale(1);opacity:1}}@keyframes badgeEarned{0%{transform:scale(0) rotate(-30deg);opacity:0}60%{transform:scale(1.1) rotate(5deg);opacity:1}to{transform:scale(1) rotate(0);opacity:1}}@keyframes flameDance{0%,to{transform:scaleY(1) scaleX(1)}25%{transform:scaleY(1.05) scaleX(.97)}50%{transform:scaleY(.97) scaleX(1.03)}75%{transform:scaleY(1.03) scaleX(.98)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes cardFlip{0%{transform:rotateY(0)}to{transform:rotateY(180deg)}}@keyframes cardFlipBack{0%{transform:rotateY(180deg)}to{transform:rotateY(360deg)}}.animate-fade-in{animation:fadeIn var(--duration-normal) var(--ease-out-expo)}.animate-correct{animation:correctPulse .5s var(--ease-spring)}.animate-incorrect{animation:incorrectShake .4s var(--ease-gentle)}.animate-xp-float{animation:xpFloat 1.2s var(--ease-out-expo) forwards}.animate-badge-earned{animation:badgeEarned .6s var(--ease-spring)}.animate-level-up{animation:levelUpBurst .5s var(--ease-spring)}.skeleton{background:linear-gradient(90deg,var(--color-bg-tertiary) 25%,var(--color-bg-elevated) 50%,var(--color-bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm)}.flex{display:flex}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-1{gap:var(--space-1)}.gap-2{gap:var(--space-2)}.gap-3{gap:var(--space-3)}.gap-4{gap:var(--space-4)}.gap-5{gap:var(--space-5)}.gap-6{gap:var(--space-6)}.gap-8{gap:var(--space-8)}.glass{background:var(--color-glass-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--color-glass-border)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-width);background:var(--color-bg-secondary);border-right:1px solid var(--color-border);display:flex;flex-direction:column;z-index:100;overflow-y:auto}.sidebar-logo{padding:var(--space-6);display:flex;align-items:center;gap:var(--space-3)}.sidebar-logo-icon{font-size:1.5rem}.sidebar-logo-text{font-family:var(--font-heading);font-weight:700;font-size:1.25rem;color:var(--color-text-primary)}.sidebar-nav{flex:1;padding:var(--space-2) var(--space-3);display:flex;flex-direction:column;gap:var(--space-1)}.sidebar-link{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);font-size:.9375rem;color:var(--color-text-secondary);transition:background-color var(--duration-normal) var(--ease-gentle),color var(--duration-normal) var(--ease-gentle)}.sidebar-link:hover{background:var(--color-bg-tertiary);color:var(--color-text-primary)}.sidebar-link-active{background:var(--color-primary-muted);color:var(--color-primary-light);font-weight:500}.sidebar-link-icon{font-size:1.25rem;width:1.5rem;text-align:center}.sidebar-footer{padding:var(--space-4) var(--space-3);border-top:1px solid var(--color-border);display:flex;flex-direction:column;gap:var(--space-2)}.sidebar-stats{padding:var(--space-3) var(--space-4);display:flex;flex-direction:column;gap:var(--space-2);font-size:.8125rem;color:var(--color-text-muted)}.sidebar-stats-value{font-family:var(--font-mono);font-weight:500;color:var(--color-text-primary)}.sidebar-user{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4)}.theme-switcher{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);font-size:.8125rem;color:var(--color-text-muted);cursor:pointer;border-radius:var(--radius-sm);transition:background var(--duration-normal) var(--ease-gentle)}.theme-switcher:hover{background:var(--color-bg-tertiary);color:var(--color-text-secondary)}.mobile-nav{display:none;position:fixed;bottom:0;left:0;right:0;height:var(--mobile-nav-height);background:var(--color-bg-secondary);border-top:1px solid var(--color-border);z-index:100}.mobile-nav-links{display:flex;align-items:center;justify-content:space-around;height:100%;padding:0 var(--space-2)}.mobile-nav-link{display:flex;flex-direction:column;align-items:center;gap:2px;padding:var(--space-2);font-size:.625rem;color:var(--color-text-muted);border-radius:var(--radius-sm);transition:color var(--duration-normal) var(--ease-gentle)}.mobile-nav-link-active{color:var(--color-primary-light)}.mobile-nav-link-icon{font-size:1.375rem}.layout-main{margin-left:var(--sidebar-width);min-height:100dvh;padding:var(--space-8);animation:fadeIn var(--duration-normal) var(--ease-out-expo)}@media(max-width:1023px){.sidebar{display:none}.mobile-nav{display:block}.layout-main{margin-left:0;padding:var(--space-4);padding-bottom:calc(var(--mobile-nav-height) + var(--space-4))}}