@import"https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap";*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--color-background: #1A1A1A;--color-surface: #242424;--color-surface-raised: #2E2E2E;--color-primary: #C41E3A;--color-primary-hover: #D42A46;--color-secondary: #B8956A;--color-secondary-hover: #C9A67B;--color-text-primary: #E8E6E0;--color-text-secondary: #A8A6A0;--color-text-disabled: #666663;--color-text-on-primary: #FFFFFF;--color-success: #7C9885;--color-warning: #D4A373;--color-error: #E57373;--color-info: #5A8A9A;--color-border-default: #333333;--color-border-subtle: #2A2A2A;--color-border-focus: #C41E3A;--gradient-gold: linear-gradient(135deg, #B8956A 0%, #D4A373 100%);--gradient-surface: linear-gradient(180deg, #1A1A1A 0%, #141414 100%);--gradient-crimson-glow: radial-gradient(circle, rgba(196, 30, 58, .15) 0%, transparent 70%);--font-primary: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", -apple-system, BlinkMacSystemFont, sans-serif;--font-display: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;--font-mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;--font-size-display: 72px;--font-size-kanji-large: 48px;--font-size-h1: 32px;--font-size-h2: 24px;--font-size-h3: 20px;--font-size-body: 16px;--font-size-body-small: 14px;--font-size-caption: 12px;--font-size-reading: 14px;--font-weight-light: 300;--font-weight-regular: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-display: 1;--line-height-kanji: 1.1;--line-height-heading: 1.2;--line-height-body: 1.6;--line-height-caption: 1.5;--letter-spacing-tight: -.02em;--letter-spacing-heading: -.01em;--letter-spacing-normal: 0;--letter-spacing-wide: .01em;--letter-spacing-wider: .02em;--letter-spacing-reading: .05em;--space-0: 0;--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;--space-20: 80px;--space-24: 96px;--space-element: 8px;--space-group: 16px;--space-section: 32px;--space-page: 64px;--space-kanji: 48px;--radius-none: 0;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .5);--shadow-crimson: 0 4px 14px rgba(196, 30, 58, .25);--shadow-gold: 0 4px 14px rgba(184, 149, 106, .25);--duration-fast: .15s;--duration-normal: .3s;--duration-slow: .5s;--ease-default: cubic-bezier(.4, 0, .2, 1);--ease-in: cubic-bezier(.4, 0, 1, 1);--ease-out: cubic-bezier(0, 0, .2, 1);--ease-bounce: cubic-bezier(.34, 1.56, .64, 1)}html,body{height:100%;overflow:hidden;touch-action:manipulation;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-primary);font-size:var(--font-size-body);font-weight:var(--font-weight-regular);line-height:var(--line-height-body);color:var(--color-text-primary);background:var(--color-background);background-image:var(--gradient-crimson-glow);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{height:100%;display:flex;flex-direction:column}.screen{display:none;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:var(--space-6);position:relative;overflow:hidden}.screen.active{display:flex}.title{font-size:var(--font-size-h1);font-weight:var(--font-weight-semibold);letter-spacing:var(--letter-spacing-tight);color:var(--color-text-primary);margin-bottom:var(--space-12);text-align:center}.title:after{content:"";display:block;width:48px;height:3px;background:var(--color-primary);margin:var(--space-4) auto 0;border-radius:var(--radius-full)}h2,.screen-title{font-size:var(--font-size-h2);font-weight:var(--font-weight-semibold);letter-spacing:var(--letter-spacing-heading);margin-bottom:var(--space-6);text-align:center}h3{font-size:var(--font-size-h3);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-4)}button{font-family:var(--font-primary);font-size:var(--font-size-body);font-weight:var(--font-weight-medium);padding:var(--space-3) var(--space-6);border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--duration-fast) var(--ease-out);-webkit-user-select:none;user-select:none}button:active{transform:scale(.98)}.btn-primary{background:var(--color-primary);color:var(--color-text-on-primary);padding:var(--space-4) var(--space-8);font-size:var(--font-size-body);font-weight:var(--font-weight-semibold);box-shadow:var(--shadow-crimson)}.btn-primary:hover{background:var(--color-primary-hover);transform:translateY(-2px);box-shadow:0 6px 24px #c41e3a66}.btn-secondary{background:transparent;color:var(--color-text-primary);padding:var(--space-4) var(--space-8);border:1px solid var(--color-border-default)}.btn-secondary:hover{border-color:var(--color-text-primary);background:#ffffff08}.btn-gold{background:var(--gradient-gold);color:var(--color-background);font-weight:var(--font-weight-semibold);box-shadow:var(--shadow-gold)}.btn-gold:hover{transform:translateY(-2px);box-shadow:0 6px 24px #b8956a66}.card{background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);padding:var(--space-6);transition:all var(--duration-fast) var(--ease-out)}.card:hover{border-color:var(--color-border-default);background:var(--color-surface-raised)}.card-elevated{background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);padding:var(--space-8);box-shadow:var(--shadow-md)}input,select{font-family:var(--font-primary);font-size:var(--font-size-body);padding:var(--space-4);background:var(--color-background);color:var(--color-text-primary);border:1px solid var(--color-border-default);border-radius:var(--radius-sm);transition:border-color var(--duration-fast) var(--ease-out);width:100%}input:focus,select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #c41e3a26}input::placeholder{color:var(--color-text-disabled)}label{font-size:var(--font-size-body-small);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-2);display:block}#auth{background:var(--gradient-surface)}#auth .title{font-size:36px;margin-bottom:var(--space-16)}.auth-container{width:100%;max-width:360px;display:flex;flex-direction:column;gap:var(--space-6)}.btn-google{display:flex;align-items:center;justify-content:center;gap:var(--space-3);padding:var(--space-4);background:#fff;color:#333;border:none;border-radius:var(--radius-sm);font-weight:var(--font-weight-medium);transition:all var(--duration-fast) var(--ease-out)}.btn-google:hover{background:#f8f8f8;box-shadow:var(--shadow-md)}.google-icon{flex-shrink:0}.auth-divider{display:flex;align-items:center;gap:var(--space-4);color:var(--color-text-disabled);font-size:var(--font-size-body-small)}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--color-border-default)}.auth-form{display:flex;flex-direction:column;gap:var(--space-4)}.auth-buttons{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3);margin-top:var(--space-2)}.auth-error{color:var(--color-error);font-size:var(--font-size-body-small);text-align:center;min-height:20px;padding:var(--space-2);background:#e573731a;border-radius:var(--radius-sm)}.auth-error:empty{display:none}.menu-screen{padding:var(--space-8);justify-content:space-between;position:relative;overflow:hidden}.kanji-background{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0;overflow:hidden}.floating-kanji{position:absolute;font-family:var(--font-display);color:var(--color-primary);opacity:0;pointer-events:none;-webkit-user-select:none;user-select:none;animation:kanjiFloat var(--float-duration, 5s) ease-in-out forwards;text-shadow:0 0 40px rgba(196,30,58,.4)}@keyframes kanjiFloat{0%{opacity:0;transform:translateY(30px) scale(.7) rotate(-5deg)}20%{opacity:var(--max-opacity, .08);transform:translateY(0) scale(1) rotate(0)}50%{opacity:var(--max-opacity, .08);transform:translateY(-15px) scale(1.02) rotate(2deg)}80%{opacity:var(--max-opacity, .08);transform:translateY(-5px) scale(1) rotate(-1deg)}to{opacity:0;transform:translateY(-30px) scale(.8) rotate(3deg)}}.menu-header,.menu-hero,.menu-nav,.menu-side-icons,.settings-panel,.account-panel{position:relative;z-index:1}.menu-header{position:absolute;top:var(--space-6);left:var(--space-6)}.logo{display:flex;align-items:center;gap:var(--space-3)}.logo-icon{width:40px;height:40px;object-fit:contain}.logo-text{font-size:var(--font-size-body);font-weight:var(--font-weight-medium);color:var(--color-text-primary);letter-spacing:var(--letter-spacing-wide)}.menu-hero{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;padding:var(--space-16) 0}.hero-kanji{font-family:var(--font-display);font-size:180px;font-weight:var(--font-weight-medium);color:var(--color-primary);line-height:var(--line-height-display);text-shadow:0 0 80px rgba(196,30,58,.4),0 0 40px rgba(196,30,58,.2);animation:kanji-glow 4s ease-in-out infinite alternate}@keyframes kanji-glow{0%{text-shadow:0 0 60px rgba(196,30,58,.3),0 0 30px rgba(196,30,58,.15)}to{text-shadow:0 0 100px rgba(196,30,58,.5),0 0 50px rgba(196,30,58,.25)}}.hero-reading{margin-top:var(--space-6);font-size:var(--font-size-body);font-weight:var(--font-weight-regular);color:var(--color-secondary);letter-spacing:var(--letter-spacing-reading);text-transform:lowercase}.menu-nav{display:flex;gap:var(--space-4);justify-content:center;padding-bottom:var(--space-8)}.nav-btn{padding:var(--space-4) var(--space-8);min-width:140px;background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-sm);color:var(--color-text-primary);font-size:var(--font-size-body-small);font-weight:var(--font-weight-medium);letter-spacing:var(--letter-spacing-wide);cursor:pointer;transition:all var(--duration-fast) var(--ease-default)}.nav-btn:hover{background:var(--color-surface-raised);border-color:var(--color-text-secondary);transform:translateY(-2px)}.nav-btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-text-on-primary);box-shadow:var(--shadow-crimson)}.nav-btn-primary:hover{background:var(--color-primary-hover);border-color:var(--color-primary-hover)}.nav-btn-text{display:block}.menu-side-icons{position:absolute;right:var(--space-6);top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:var(--space-4)}.side-icon{width:48px;height:48px;padding:0;display:flex;align-items:center;justify-content:center;background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-full);color:var(--color-secondary);cursor:pointer;transition:all var(--duration-fast) var(--ease-default)}.side-icon:hover{background:var(--color-surface-raised);border-color:var(--color-secondary);color:var(--color-secondary-hover);transform:scale(1.05);box-shadow:var(--shadow-gold)}.side-icon svg{width:20px;height:20px;min-width:20px;flex-shrink:0}.side-icon-admin{display:none;color:var(--color-primary);border-color:#c41e3a4d}.side-icon-admin:hover{border-color:var(--color-primary);color:var(--color-primary-hover);box-shadow:var(--shadow-crimson)}.settings-panel,.account-panel{position:absolute;right:var(--space-20);top:50%;transform:translateY(-50%) translate(20px);width:280px;background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);padding:var(--space-6);opacity:0;visibility:hidden;transition:all var(--duration-normal) var(--ease-default);z-index:100;box-shadow:var(--shadow-lg)}.settings-panel.active,.account-panel.active{opacity:1;visibility:visible;transform:translateY(-50%) translate(0)}.settings-header,.account-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-6);padding-bottom:var(--space-4);border-bottom:1px solid var(--color-border-default)}.settings-header h3,.account-header h3{font-size:var(--font-size-body);font-weight:var(--font-weight-semibold);color:var(--color-text-primary)}.settings-close{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--color-text-secondary);font-size:20px;cursor:pointer;border-radius:var(--radius-sm)}.settings-close:hover{background:var(--color-surface-raised);color:var(--color-text-primary)}.setting-group{margin-bottom:var(--space-5)}.setting-group label{display:block;font-size:var(--font-size-caption);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-2);text-transform:uppercase;letter-spacing:var(--letter-spacing-wider)}.setting-group select{width:100%;padding:var(--space-3) var(--space-4);background:var(--color-surface-raised);border:1px solid var(--color-border-default);border-radius:var(--radius-sm);color:var(--color-text-primary);font-size:var(--font-size-body-small)}.settings-stats{margin-top:var(--space-6);padding-top:var(--space-4);border-top:1px solid var(--color-border-default);font-size:var(--font-size-caption);color:var(--color-text-disabled)}.account-content{text-align:center}.account-email{font-size:var(--font-size-body-small);color:var(--color-text-secondary);margin-bottom:var(--space-6);word-break:break-all}.upgrade-section{padding:var(--space-5);background:#b8956a0d;border:1px solid rgba(184,149,106,.2);border-radius:var(--radius-md);margin-bottom:var(--space-5)}.upgrade-section.hidden{display:none}.upgrade-badge{display:inline-block;padding:var(--space-1) var(--space-3);background:var(--color-text-disabled);color:var(--color-background);font-size:10px;font-weight:var(--font-weight-bold);letter-spacing:var(--letter-spacing-reading);border-radius:var(--radius-sm);margin-bottom:var(--space-3)}.upgrade-badge.premium{background:var(--gradient-gold)}.upgrade-section p{font-size:var(--font-size-caption);color:var(--color-text-secondary);margin-bottom:var(--space-4)}.btn-upgrade{display:inline-block;padding:var(--space-2) var(--space-5);background:var(--gradient-gold);color:var(--color-background);font-size:var(--font-size-caption);font-weight:var(--font-weight-semibold);border-radius:var(--radius-sm);text-decoration:none;transition:all var(--duration-fast) var(--ease-out)}.btn-upgrade:hover{transform:translateY(-1px);box-shadow:var(--shadow-gold)}.btn-manage-subscription{display:none;margin-top:var(--space-3);padding:var(--space-2) var(--space-4);background:transparent;color:var(--color-secondary);font-size:var(--font-size-caption);border:1px solid rgba(184,149,106,.3);border-radius:var(--radius-sm);text-decoration:none}.btn-manage-subscription:hover{background:#b8956a1a}.upgrade-section.is-premium{background:linear-gradient(135deg,#b8956a1a,#b8956a05);border-color:#b8956a4d}.upgrade-section.is-premium .upgrade-badge{background:var(--gradient-gold);color:var(--color-background)}.upgrade-section.is-premium p{color:var(--color-secondary)}.btn-signout{width:100%;padding:var(--space-3) var(--space-4);font-size:var(--font-size-caption);background:transparent;color:var(--color-text-disabled);border:1px solid var(--color-border-default);border-radius:var(--radius-sm)}.btn-signout:hover{color:var(--color-text-primary);border-color:var(--color-text-secondary)}#exam{background:var(--color-background);position:relative}.timer-bar{position:absolute;top:0;left:0;height:4px;background:var(--color-primary);transition:width linear;box-shadow:0 0 12px var(--color-primary)}.timer-bar.urgent{background:var(--color-error);box-shadow:0 0 16px var(--color-error);animation:pulse-urgent .5s ease-in-out infinite}@keyframes pulse-urgent{0%,to{opacity:1}50%{opacity:.6}}.countdown{position:absolute;top:var(--space-6);right:var(--space-6);font-size:var(--font-size-h2);font-weight:var(--font-weight-light);font-variant-numeric:tabular-nums;color:var(--color-text-disabled);opacity:.6;transition:all var(--duration-fast)}.countdown.urgent{color:var(--color-error);opacity:1;animation:shake .3s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.kanji-display{font-size:clamp(120px,35vw,280px);font-weight:var(--font-weight-medium);line-height:var(--line-height-display);color:var(--color-primary);text-shadow:0 0 60px rgba(196,30,58,.2);transition:all var(--duration-normal) var(--ease-out);padding:var(--space-12)}.kanji-display.neutral{color:var(--color-text-primary);text-shadow:none}.kanji-display.countdown-number{color:var(--color-primary);animation:pulse-kanji 1s ease-in-out infinite}@keyframes pulse-kanji{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.8}}.kanji-display.meaning{font-size:clamp(24px,8vw,48px);font-weight:var(--font-weight-light);color:var(--color-text-secondary);text-shadow:none}.choices{position:absolute;bottom:var(--space-12);left:50%;transform:translate(-50%);display:flex;gap:var(--space-6);pointer-events:none}.choice{padding:var(--space-4) var(--space-8);font-size:var(--font-size-h3);background:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border-default);border-radius:var(--radius-md);min-width:160px;pointer-events:auto;transition:all var(--duration-fast) var(--ease-out)}.choice:hover{background:var(--color-surface-raised);border-color:var(--color-text-secondary)}.choice:before{content:attr(data-key);font-size:var(--font-size-caption);color:var(--color-text-disabled);display:block;margin-bottom:var(--space-1)}.choice.correct{background:var(--color-success);border-color:var(--color-success);color:#fff}.choice.wrong{background:var(--color-error);border-color:var(--color-error);color:#fff}.flash-overlay{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;opacity:0;transition:opacity var(--duration-fast);z-index:100}.flash-overlay.correct{background:radial-gradient(circle at center,rgba(124,152,133,.4) 0%,transparent 70%);opacity:1}.flash-overlay.wrong{background:radial-gradient(circle at center,rgba(229,115,115,.4) 0%,transparent 70%);opacity:1}.touch-zones{position:absolute;top:0;right:0;bottom:0;left:0;display:none;grid-template-columns:1fr 1fr}.touch-zones.active{display:grid}.zone{display:flex;align-items:flex-end;justify-content:center;padding-bottom:var(--space-10)}.zone[data-index="0"]{justify-content:flex-start;padding-left:var(--space-4)}.zone[data-index="1"]{justify-content:flex-end;padding-right:var(--space-4)}.zone-label{font-size:var(--font-size-body);padding:var(--space-4) var(--space-5);background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);color:var(--color-text-primary)}#learn{background:var(--color-background)}.learn-hint{position:absolute;top:var(--space-4);left:var(--space-4);font-size:var(--font-size-caption);color:var(--color-text-disabled);opacity:.5}.learn-progress{position:absolute;top:var(--space-4);right:var(--space-4);font-size:var(--font-size-h3);font-weight:var(--font-weight-light);font-variant-numeric:tabular-nums;color:var(--color-text-disabled)}.voice-btn{position:absolute;top:var(--space-6);left:50%;transform:translate(-50%);width:56px;height:56px;padding:0;background:var(--color-surface);border:2px solid var(--color-secondary);border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--duration-fast) var(--ease-default);box-shadow:0 0 20px #b8956a26}.voice-btn:hover{background:var(--color-surface-raised);border-color:var(--color-secondary-hover);transform:translate(-50%) scale(1.08);box-shadow:0 0 30px #b8956a4d}.voice-btn:active{transform:translate(-50%) scale(.95)}.voice-icon{width:22px;height:22px;min-width:22px;flex-shrink:0}.voice-icon.off,.voice-btn.muted .voice-icon.on{display:none}.voice-btn.muted .voice-icon.off{display:block}.voice-btn.muted{border-color:var(--color-border-default);box-shadow:none}.voice-btn.muted:hover{border-color:var(--color-secondary);box-shadow:0 0 20px #b8956a33}.meaning-display{font-size:var(--font-size-h2);color:var(--color-text-secondary);margin-top:var(--space-8);opacity:0;transition:opacity var(--duration-normal)}.meaning-display.visible{opacity:1}.learn-response{position:absolute;bottom:0;left:0;right:0;display:none;grid-template-columns:1fr 1fr;height:25vh;min-height:120px}.learn-response.visible{display:grid}.response-zone{display:flex;align-items:center;justify-content:center;font-size:var(--font-size-body);font-weight:var(--font-weight-medium);cursor:pointer;transition:all var(--duration-fast)}.response-zone.didnt-know{background:#e573731a;color:var(--color-error);border-right:1px solid var(--color-border-default)}.response-zone.didnt-know:hover{background:#e5737333}.response-zone.knew-it{background:#7c98851a;color:var(--color-success)}.response-zone.knew-it:hover{background:#7c988533}#results{text-align:center}#results h2{font-size:var(--font-size-h1);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-8)}.result-stats{margin-bottom:var(--space-10)}.result-stats .accuracy{font-size:clamp(48px,15vw,96px);font-weight:var(--font-weight-light);color:var(--color-primary);line-height:var(--line-height-display);margin-bottom:var(--space-4)}.result-stats .detail{font-size:var(--font-size-body);color:var(--color-text-secondary)}#results .btn-primary{margin-bottom:var(--space-4)}#stats-screen{padding:var(--space-6);overflow-y:auto;align-items:stretch;justify-content:flex-start;max-width:600px;margin:0 auto;width:100%}.back-btn{align-self:flex-start;padding:var(--space-2) var(--space-4);background:transparent;color:var(--color-text-secondary);border:none;font-size:var(--font-size-body-small);margin-bottom:var(--space-4)}.back-btn:hover{color:var(--color-text-primary)}.stats-title{font-size:var(--font-size-h2);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-8);text-align:center}.stats-overview{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-4);margin-bottom:var(--space-10)}.stat-card{background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);padding:var(--space-5);text-align:center}.stat-card.highlight{border-color:var(--color-primary);background:linear-gradient(135deg,rgba(196,30,58,.1),transparent)}.stat-card.premium-highlight{border-color:var(--color-secondary);background:linear-gradient(135deg,#b8956a26,#b8956a0d)}.stat-value{font-size:var(--font-size-h1);font-weight:var(--font-weight-light);color:var(--color-primary);line-height:var(--line-height-heading)}.stat-card.premium-highlight .stat-value{color:var(--color-secondary)}.stat-label{font-size:var(--font-size-caption);color:var(--color-text-disabled);margin-top:var(--space-2);text-transform:uppercase;letter-spacing:var(--letter-spacing-reading)}.stats-section{margin-bottom:var(--space-8)}.stats-section h3{font-size:var(--font-size-body);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-4)}.grade-bars{display:flex;flex-direction:column;gap:var(--space-3)}.grade-row{display:flex;align-items:center;gap:var(--space-4)}.grade-label{font-size:var(--font-size-body-small);color:var(--color-text-secondary);width:70px;flex-shrink:0}.grade-bar-container{flex:1;height:8px;background:var(--color-surface);border-radius:var(--radius-full);overflow:hidden}.grade-bar-fill{height:100%;background:var(--color-primary);border-radius:var(--radius-full);transition:width var(--duration-slow) var(--ease-out)}.grade-bar-fill.mastered{background:var(--gradient-gold)}.grade-percent{font-size:var(--font-size-caption);color:var(--color-text-disabled);width:45px;text-align:right;font-variant-numeric:tabular-nums}.mastery-chart{background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);padding:var(--space-5)}.mastery-bar{display:flex;height:28px;border-radius:var(--radius-sm);overflow:hidden;background:var(--color-background)}.mastery-segment{transition:width var(--duration-slow) var(--ease-out)}.mastery-segment.new{background:var(--color-text-disabled)}.mastery-segment.learning{background:var(--color-primary)}.mastery-segment.mastered{background:var(--gradient-gold)}.mastery-legend{display:flex;justify-content:center;gap:var(--space-6);margin-top:var(--space-4)}.legend-item{display:flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-caption);color:var(--color-text-secondary)}.dot{width:12px;height:12px;border-radius:var(--radius-full)}.dot.new{background:var(--color-text-disabled)}.dot.learning{background:var(--color-primary)}.dot.mastered{background:var(--color-secondary)}#subscription{padding:var(--space-6);overflow-y:auto;align-items:stretch;justify-content:flex-start;max-width:480px;margin:0 auto;width:100%}.subscription-title{font-size:var(--font-size-h2);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-8);text-align:center}.subscription-status{background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);padding:var(--space-8);text-align:center;margin-bottom:var(--space-6)}.subscription-status.premium{border-color:#b8956a66;background:linear-gradient(135deg,rgba(184,149,106,.1),transparent)}.subscription-status.cancelled{border-color:#e5737366;background:linear-gradient(135deg,rgba(229,115,115,.1),transparent)}.status-badge{display:inline-block;padding:var(--space-2) var(--space-4);font-size:var(--font-size-caption);font-weight:var(--font-weight-bold);letter-spacing:var(--letter-spacing-reading);border-radius:var(--radius-full);margin-bottom:var(--space-4)}.status-badge.premium{background:var(--gradient-gold);color:var(--color-background)}.status-badge.cancelling{background:var(--color-error);color:#fff}.status-details{display:flex;flex-direction:column;gap:var(--space-1)}.status-plan{font-size:var(--font-size-h3);font-weight:var(--font-weight-medium)}.status-period{font-size:var(--font-size-body-small);color:var(--color-text-secondary)}.status-period.warning{color:var(--color-error)}.subscription-actions{display:flex;justify-content:center;gap:var(--space-4);margin-bottom:var(--space-8)}.btn-cancel{padding:var(--space-3) var(--space-6);background:transparent;color:var(--color-error);border:1px solid var(--color-error);border-radius:var(--radius-sm)}.btn-cancel:hover{background:#e573731a}.btn-reactivate{padding:var(--space-3) var(--space-6);background:var(--color-success);color:#fff;border:none;border-radius:var(--radius-sm)}.btn-reactivate:hover{background:#6a8673}.subscription-section{margin-bottom:var(--space-8)}.subscription-section h3{font-size:var(--font-size-body);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-4)}.payment-method{display:flex;justify-content:space-between;align-items:center;background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);padding:var(--space-4)}.card-info{display:flex;align-items:center;gap:var(--space-3)}.card-brand{font-weight:var(--font-weight-medium)}.card-number{color:var(--color-text-secondary)}.card-expiry{font-size:var(--font-size-body-small);color:var(--color-text-disabled)}.btn-update-payment{padding:var(--space-2) var(--space-4);font-size:var(--font-size-caption);background:transparent;color:var(--color-primary);border:1px solid var(--color-primary);border-radius:var(--radius-sm)}.btn-update-payment:hover{background:#c41e3a1a}.payment-form-container{background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);padding:var(--space-5);margin-top:var(--space-4)}#card-element{padding:var(--space-4);background:var(--color-background);border:1px solid var(--color-border-default);border-radius:var(--radius-sm);margin-bottom:var(--space-4)}.payment-form-actions{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)}.payment-error{color:var(--color-error);font-size:var(--font-size-body-small);text-align:center;margin-top:var(--space-3)}.invoices-list{display:flex;flex-direction:column;gap:var(--space-3)}.invoice-item{display:flex;justify-content:space-between;align-items:center;background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);padding:var(--space-4)}.invoice-info{display:flex;flex-direction:column;gap:var(--space-1)}.invoice-date{font-size:var(--font-size-body-small)}.invoice-amount{font-weight:var(--font-weight-medium);color:var(--color-text-primary)}.invoice-status{font-size:var(--font-size-caption);color:var(--color-success)}.invoice-status.failed{color:var(--color-error)}.btn-download{padding:var(--space-2) var(--space-3);font-size:var(--font-size-caption);background:transparent;color:var(--color-text-secondary);border:1px solid var(--color-border-default);border-radius:var(--radius-sm);text-decoration:none}.btn-download:hover{color:var(--color-text-primary);border-color:var(--color-text-secondary)}.loading,.no-invoices{text-align:center;color:var(--color-text-disabled);padding:var(--space-8);font-size:var(--font-size-body-small)}#admin{padding:var(--space-6);overflow-y:auto;align-items:stretch;justify-content:flex-start}.admin-title{font-size:var(--font-size-h2);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-8);text-align:center}.admin-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:var(--space-4);margin-bottom:var(--space-8)}.admin-section{margin-bottom:var(--space-8)}.admin-section h3{font-size:var(--font-size-body);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-4)}.admin-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-4);gap:var(--space-4)}.admin-search{padding:var(--space-3) var(--space-4);background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-sm);font-size:var(--font-size-body-small);width:280px}.admin-table{width:100%;border-collapse:collapse;background:var(--color-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-md);overflow:hidden;font-size:var(--font-size-body-small)}.admin-table th,.admin-table td{padding:var(--space-3) var(--space-4);text-align:left;border-bottom:1px solid var(--color-border-default)}.admin-table th{background:var(--color-surface-raised);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);font-size:var(--font-size-caption);text-transform:uppercase;letter-spacing:var(--letter-spacing-reading)}.admin-table th.sortable{cursor:pointer;-webkit-user-select:none;user-select:none}.admin-table th.sortable:hover{background:#ffffff0d}.sort-icon:after{content:"↕";margin-left:var(--space-2);opacity:.3}.admin-table th.sortable.asc .sort-icon:after{content:"↑";opacity:1}.admin-table th.sortable.desc .sort-icon:after{content:"↓";opacity:1}.admin-table tr:hover{background:#ffffff05}.admin-table .status-active{color:var(--color-success)}.admin-table .status-disabled{color:var(--color-error)}.status-premium{color:var(--color-secondary)}.admin-actions{display:flex;gap:var(--space-2)}.btn-action{padding:var(--space-1) var(--space-2);font-size:var(--font-size-caption);border-radius:var(--radius-sm)}.btn-disable{background:#e5737333;color:var(--color-error);border:none}.btn-enable{background:#7c988533;color:var(--color-success);border:none}.btn-reset{background:transparent;color:var(--color-text-disabled);border:1px solid var(--color-border-default)}.btn-grant{background:var(--gradient-gold);color:var(--color-background);border:none}.btn-revoke{background:transparent;color:var(--color-secondary);border:1px solid var(--color-secondary)}.admin-pagination{display:flex;justify-content:center;align-items:center;gap:var(--space-4);margin-top:var(--space-6);padding-top:var(--space-4);border-top:1px solid var(--color-border-default)}.btn-page{padding:var(--space-2) var(--space-4);font-size:var(--font-size-body-small);background:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border-default);border-radius:var(--radius-sm)}.btn-page:hover:not(:disabled){border-color:var(--color-primary)}.btn-page:disabled{opacity:.3;cursor:not-allowed}#admin-page-info{font-size:var(--font-size-body-small);color:var(--color-text-disabled)}@media (max-width: 600px){.screen{padding:var(--space-4)}.title{font-size:var(--font-size-h2)}.auth-container{max-width:100%}.auth-buttons{grid-template-columns:1fr}.menu-buttons{flex-direction:column;width:100%;max-width:280px}.menu-buttons button{width:100%}.choices{display:none}.touch-zones{display:grid}.kanji-display{font-size:clamp(100px,45vw,200px)}.stats-overview{grid-template-columns:repeat(3,1fr);gap:var(--space-2)}.stat-card{padding:var(--space-3)}.stat-value{font-size:var(--font-size-h2)}.grade-label{width:55px;font-size:var(--font-size-caption)}.payment-method{flex-direction:column;gap:var(--space-4)}.card-info{justify-content:center;flex-wrap:wrap}.btn-update-payment{width:100%}.invoice-item{flex-direction:column;gap:var(--space-3);align-items:stretch}.invoice-actions{justify-content:center}.admin-stats{grid-template-columns:repeat(2,1fr)}.admin-toolbar{flex-direction:column;align-items:stretch}.admin-search{width:100%}.admin-table{font-size:11px;display:block;overflow-x:auto}.admin-table th,.admin-table td{padding:var(--space-2);white-space:nowrap}.admin-actions{flex-direction:column;gap:var(--space-1)}}@media (min-width: 601px){.touch-zones{display:none!important}}*:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media (prefers-contrast: high){:root{--color-border-default: #555555;--color-text-disabled: #888888}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.screen.active{animation:fadeIn var(--duration-normal) var(--ease-out)}.grade-select.has-locked option.locked{color:var(--color-text-disabled)}.grade-select .lock-icon{margin-left:var(--space-1)}