:root{color:#17202a;background:#f7fbff;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic,YuGothic,Noto Sans JP,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--bg: #f7fbff;--surface: #ffffff;--surface-strong: #eef6ff;--surface-muted: #f5f8fb;--text: #17202a;--muted: #657386;--border: #dfe7ef;--accent: #15836a;--accent-strong: #0e5f4f;--accent-pressed: #0a4e41;--accent-soft: #e8f6f1;--action: #2664c7;--action-pressed: #1e4f9f;--action-soft: #eaf2ff;--indigo: #365fba;--indigo-soft: #eef1ff;--danger: #b42318;--danger-soft: #fff1f0;--success: #13795b;--success-soft: #edf8f4;--warning: #b65c00;--warning-soft: #fff7e8;--focus-ring: rgba(38, 100, 199, .34);--surface-hover: #f7fafc;--shadow: 0 14px 30px rgba(25, 39, 52, .08);--shadow-soft: 0 8px 22px rgba(25, 39, 52, .06);--shadow-nav: 0 -10px 24px rgba(25, 39, 52, .07)}*{box-sizing:border-box}html{min-width:320px;background:var(--bg)}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg)}button{border:0;cursor:pointer;font:inherit}button:disabled{cursor:not-allowed}button:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px}.app-shell,.session-shell{min-height:100vh;min-height:100dvh;background:var(--bg)}.screen{width:min(100%,480px);margin:0 auto;padding:calc(20px + env(safe-area-inset-top)) 18px calc(92px + env(safe-area-inset-bottom))}.stack{display:flex;flex-direction:column;gap:18px}.top-header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.top-header>div:first-child{min-width:0}.top-header h1,.question-panel h1,.session-complete h1{margin:3px 0 0;color:var(--text);font-size:24px;line-height:1.25;letter-spacing:0;overflow-wrap:anywhere}.muted,.source-note,.hint-text,.empty-text{color:var(--muted)}.muted,.label,.source-note,.hint-text{margin:0;font-size:13px;line-height:1.5}.label{color:var(--muted);font-weight:700}.streak-chip,.timer-pill{flex-shrink:0;display:inline-flex;min-height:34px;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);border-radius:999px;background:var(--surface);color:var(--accent-strong);padding:0 11px;font-size:13px;font-weight:800;white-space:nowrap}.primary-panel,.section-block,.question-panel,.passage-block{border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow-soft)}.primary-panel{display:flex;flex-direction:column;gap:16px;padding:18px}.primary-panel.quiet{border-style:dashed;background:var(--surface-muted);box-shadow:none}.primary-panel h2,.section-block h2,.passage-block h2{margin:0;color:var(--text);font-size:18px;line-height:1.35;letter-spacing:0}.goal-row{display:flex;align-items:center;justify-content:space-between;gap:14px}.goal-row strong{display:block;margin-top:2px;font-size:25px;line-height:1.1}.goal-row span{color:var(--accent-strong);font-weight:900}.goal-panel{gap:14px;background:linear-gradient(180deg,#fff,#f9fcff)}.goal-dashboard{display:grid;grid-template-columns:148px minmax(0,1fr);align-items:center;gap:14px}.goal-ring{width:148px;aspect-ratio:1;display:grid;place-items:center;border-radius:50%;box-shadow:inset 0 0 0 1px #177e6714,0 8px 18px #177e6714}.goal-ring>div{width:108px;aspect-ratio:1;display:grid;place-items:center;align-content:center;border-radius:50%;background:var(--surface);text-align:center}.goal-ring span,.goal-ring em{color:var(--muted);font-size:12px;font-style:normal;font-weight:750;line-height:1.25}.goal-ring strong{color:var(--text);font-size:30px;line-height:1.05}.score-card{min-width:0;display:flex;flex-direction:column;gap:8px;border-left:1px solid var(--border);padding-left:14px}.score-card strong{color:var(--accent-strong);font-size:34px;line-height:1}.score-card span{color:var(--text);font-size:13px;font-weight:800;line-height:1.35;overflow-wrap:anywhere}.score-card small{color:var(--muted);font-size:12px;font-weight:700;line-height:1.4;overflow-wrap:anywhere}.today-stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.inline-stat{min-width:0;border:1px solid var(--border);border-radius:8px;background:var(--surface-muted);padding:9px;box-shadow:0 1px #17202a05}.inline-stat span,.weak-challenge span{display:block;color:var(--muted);font-size:11px;font-weight:800;line-height:1.3}.inline-stat strong{display:block;margin-top:3px;overflow-wrap:anywhere;color:var(--text);font-size:15px;line-height:1.2}.next-action-copy{margin:0;border:1px solid #e8eef5;border-left:4px solid var(--action);border-radius:8px;background:var(--surface-muted);color:var(--text);padding:9px 10px 9px 11px;font-size:13px;font-weight:800;line-height:1.45}.weak-challenge{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;border:1px solid #eadfce;border-radius:8px;background:var(--surface);padding:14px;box-shadow:var(--shadow-soft);transition:border-color .14s ease,box-shadow .14s ease}.weak-challenge:focus-within{border-color:#b65c0057;box-shadow:0 10px 22px #b65c001a}.weak-challenge strong{display:block;margin-top:3px;color:var(--text);font-size:16px;line-height:1.25}.weak-challenge span{color:var(--warning)}.weak-challenge p{margin:3px 0 0;color:var(--muted);font-size:12px;line-height:1.45}.weak-challenge .secondary-action{border-color:#b65c0038;background:#fffaf0;color:#8a4300;min-height:44px;width:auto;padding:0 12px;white-space:nowrap}.weak-challenge .secondary-action:focus-visible{outline-color:#b65c004d}.progress-track{width:100%;height:10px;overflow:hidden;border-radius:999px;background:#e8eef5}.progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--indigo));transition:width .18s ease}.celebration{margin:0;color:var(--accent-strong);font-size:14px;font-weight:800}.primary-action,.secondary-action{min-height:52px;width:100%;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:8px;padding:0 16px;font-size:16px;font-weight:850;transition:background-color .14s ease,border-color .14s ease,color .14s ease,transform .12s ease,box-shadow .14s ease;-webkit-tap-highlight-color:transparent}.primary-action svg,.secondary-action svg{flex-shrink:0}.primary-action{background:var(--action);color:#fff;box-shadow:0 8px 18px #2664c733}.primary-action:disabled{background:#b9c8c3;color:#f8fafc;box-shadow:none;cursor:not-allowed}.primary-action:disabled,.secondary-action:disabled{transform:none}.secondary-action{border:1px solid var(--border);background:var(--surface);color:var(--text)}.secondary-action:disabled{border-color:#e3e9ef;background:#f3f6f9;color:#98a6b6;cursor:not-allowed}.secondary-action.danger{color:var(--danger)}.secondary-action.danger:focus-visible{outline-color:#b4231847}.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.metric-grid.weekly-kpis{grid-template-columns:repeat(3,minmax(0,1fr))}.metric-card{min-height:84px;border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:13px;box-shadow:0 1px #17202a05}.metric-card p{margin:0 0 7px;color:var(--muted);font-size:12px;font-weight:700}.metric-card strong{color:var(--text);font-size:22px;line-height:1.1;overflow-wrap:anywhere}.weekly-kpis .metric-card{min-height:76px;padding:11px}.weekly-kpis .metric-card strong{font-size:20px}.section-block{padding:16px}.section-heading{margin-bottom:12px}.section-heading p{margin:4px 0 0;color:var(--muted);font-size:13px;line-height:1.45}.priority-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.priority-badge{display:inline-flex;min-height:28px;align-items:center;justify-content:center;border-radius:999px;padding:0 10px;font-size:12px;font-weight:850;line-height:1;white-space:nowrap}.priority-badge.high{background:#fff0e5;color:#a34b00}.priority-badge.medium{background:var(--indigo-soft);color:var(--indigo)}.priority-badge.standard{background:var(--surface-muted);color:var(--muted)}.danger-note{margin:0 0 12px;border:1px solid rgba(180,35,24,.18);border-radius:8px;background:var(--danger-soft);color:var(--danger);padding:10px 12px;font-size:13px;font-weight:800;line-height:1.5}.reset-actions{display:grid;gap:10px}.session-switch-panel{border-color:#b423183d;box-shadow:none}.switch-actions{display:grid;gap:10px}.session-list,.history-list,.review-queue-list{display:flex;flex-direction:column;gap:10px}.review-queue-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:10px;border:1px solid var(--border);border-radius:8px;background:#fbfdff;padding:11px;transition:border-color .14s ease,background-color .14s ease,box-shadow .14s ease}.review-queue-main{min-width:0}.review-queue-meta{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin-bottom:7px}.review-queue-meta strong{color:var(--text);font-size:14px;line-height:1.3}.review-queue-main p{display:-webkit-box;overflow:hidden;margin:0;-webkit-box-orient:vertical;-webkit-line-clamp:2;color:var(--muted);font-size:12px;line-height:1.45}.review-queue-side{min-width:76px;display:flex;flex-direction:column;align-items:flex-end;gap:7px}.review-queue-side time{color:var(--muted);font-size:11px;white-space:nowrap}.session-row{width:100%;min-height:70px;display:grid;grid-template-columns:40px minmax(0,1fr) auto;align-items:center;gap:12px;border:1px solid var(--border);border-radius:8px;background:#fbfdff;color:var(--text);padding:11px;text-align:left;transition:background-color .14s ease,border-color .14s ease,transform .12s ease,box-shadow .14s ease;-webkit-tap-highlight-color:transparent}.session-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:8px;background:var(--action-soft);color:var(--action)}.session-row strong,.session-row small,.session-row em{display:block}.session-row>span{min-width:0}.session-row strong{color:var(--text);font-size:15px;line-height:1.25;overflow-wrap:anywhere}.session-row small,.session-row em{justify-self:end;color:var(--muted);font-size:12px;font-style:normal;line-height:1.4;text-align:right;white-space:nowrap}.bottom-nav{position:fixed;right:0;bottom:0;left:0;z-index:20;display:grid;grid-template-columns:repeat(4,1fr);gap:4px;border-top:1px solid var(--border);background:#fffffff5;padding:7px 10px calc(7px + env(safe-area-inset-bottom));box-shadow:var(--shadow-nav);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.bottom-nav button{min-height:58px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;border-radius:8px;background:transparent;color:var(--muted);font-size:11px;font-weight:750;transition:background-color .14s ease,color .14s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.bottom-nav button.active{background:var(--action-soft);color:var(--action);box-shadow:inset 0 0 0 1px #2664c714}.bottom-nav button:active{transform:translateY(1px)}.nav-icon-wrap{position:relative;display:inline-flex}.nav-dot{position:absolute;top:-9px;right:-13px;min-width:18px;height:18px;display:grid;place-items:center;border-radius:999px;background:var(--danger);color:#fff;font-size:10px;line-height:1}.session-shell{display:flex;flex-direction:column}.session-header{position:sticky;top:0;z-index:10;width:min(100%,480px);margin:0 auto;display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:12px;border-bottom:1px solid var(--border);background:#f8fafcf5;padding:calc(12px + env(safe-area-inset-top)) 18px 12px;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.session-header p,.session-header strong{display:block;margin:0}.session-header p{color:var(--muted);font-size:12px;font-weight:700}.session-progress-area{min-width:0;display:flex;flex-direction:column;gap:7px}.session-title-row{min-width:0;display:flex;align-items:center;justify-content:space-between;gap:8px}.session-title-row>div{min-width:0}.session-type-chip,.part-chip{max-width:100%;display:inline-flex;min-height:28px;align-items:center;border-radius:999px;background:var(--action-soft);color:var(--action);padding:0 9px;font-size:12px;font-weight:850;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-progress-track{height:6px}.icon-button{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);transition:background-color .14s ease,border-color .14s ease,color .14s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.session-content{width:min(100%,480px);margin:0 auto;padding:16px 18px 112px;display:flex;flex-direction:column;gap:14px}.passage-block,.question-panel{padding:16px}.passage-title-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.passage-title-row h2{min-width:0}.passage-title-row span{flex-shrink:0;color:var(--accent-strong);font-size:12px;font-weight:850;white-space:nowrap}.passage-text{display:flex;flex-direction:column;gap:8px}.sentence-button{width:100%;min-height:44px;border-radius:8px;background:#fbfdff;color:var(--text);padding:10px;text-align:left;font-size:15px;line-height:1.6;overflow-wrap:anywhere;transition:background-color .14s ease,box-shadow .14s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.sentence-button.selected{background:var(--accent-soft);box-shadow:inset 0 0 0 2px var(--accent)}.sentence-button.expected{background:var(--indigo-soft);box-shadow:inset 0 0 0 2px var(--indigo)}.sentence-button:disabled{opacity:1}.source-note{margin-top:12px;font-size:11px}.question-panel h1{margin:0;font-size:18px;font-weight:650;line-height:1.55}.review-note{margin:0 0 8px;color:var(--indigo);font-size:12px;font-weight:800}.choice-list{display:flex;flex-direction:column;gap:10px;margin-top:16px}.choice-button{min-height:56px;width:100%;display:grid;grid-template-columns:34px minmax(0,1fr);align-items:center;gap:10px;border:1px solid var(--border);border-radius:8px;background:#fbfdff;color:var(--text);padding:10px;text-align:left;transition:background-color .14s ease,border-color .14s ease,box-shadow .14s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.choice-button span{width:32px;height:32px;display:grid;place-items:center;border-radius:8px;background:#edf2f7;color:var(--muted);font-size:13px;font-weight:900;transition:background-color .14s ease,color .14s ease}.choice-button strong{min-width:0;font-size:15px;line-height:1.35;overflow-wrap:anywhere}.choice-button.selected{border-color:var(--action);background:var(--action-soft);box-shadow:inset 0 0 0 1px #4059ad29}.choice-button.selected span{background:var(--action);color:#fff}.choice-button.correct{border-color:var(--success);background:var(--success-soft)}.choice-button.wrong{border-color:var(--danger);background:var(--danger-soft)}.choice-button.correct span{background:var(--success);color:#fff}.choice-button.wrong span{background:var(--danger);color:#fff}.choice-button:disabled:not(.selected):not(.correct):not(.wrong){background:var(--surface-muted);color:var(--muted)}.feedback-panel{margin-top:14px;border:1px solid transparent;border-radius:8px;padding:13px;box-shadow:inset 0 1px #ffffff7a}.feedback-panel.correct{border-color:#13795b2e;background:var(--success-soft);color:#0c513d}.feedback-panel.wrong{border-color:#b423182e;background:var(--danger-soft);color:#7a271a}.feedback-title{display:flex;align-items:center;gap:7px;margin-bottom:6px}.feedback-panel p{margin:0;font-size:14px;line-height:1.55}.answer-summary{display:grid;gap:8px;margin-top:10px}.answer-card{border:1px solid rgba(101,115,134,.18);border-radius:8px;background:#ffffffad;padding:10px}.answer-card span{display:block;margin-bottom:3px;color:var(--muted);font-size:12px;font-weight:800}.answer-card strong{color:var(--text);font-size:14px;line-height:1.35}.answer-card.correct{border-color:#13795b33;background:#edf8f4bf}.answer-card.wrong{border-color:#b4231833;background:#fff1f0b8}.explanation-box{margin-top:10px;border-radius:8px;background:#ffffff9e;padding:10px}.explanation-box>strong{display:block;margin-bottom:4px;color:var(--text);font-size:13px}.feedback-panel .evidence-feedback{margin-top:8px;font-weight:800}.hint-text{margin-top:10px}.mistake-tags{margin-top:12px}.mistake-tags p{margin-bottom:8px;font-weight:800;line-height:1.45}.tag-grid{display:flex;flex-wrap:wrap;gap:8px}.tag-grid button{min-height:38px;border:1px solid rgba(122,39,26,.25);border-radius:999px;background:#fff;color:#7a271a;padding:0 12px;font-size:13px;font-weight:800;transition:background-color .14s ease,border-color .14s ease,color .14s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.tag-grid button.selected{background:#7a271a;color:#fff}.tag-grid button:focus-visible{outline-color:#7a271a47}.sticky-action{position:fixed;right:0;bottom:0;left:0;z-index:15;width:min(100%,480px);margin:0 auto;border-top:1px solid var(--border);background:#fffffff5;padding:12px 18px calc(12px + env(safe-area-inset-bottom));box-shadow:var(--shadow-nav);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.session-complete{min-height:100vh;min-height:100dvh;width:min(100%,480px);margin:0 auto;display:flex;flex-direction:column;justify-content:center;gap:14px;padding:24px 18px;text-align:center}.completion-mark{width:64px;height:64px;margin:0 auto;display:grid;place-items:center;border-radius:999px;background:var(--surface-strong);color:var(--accent)}.session-complete p{margin:0;color:var(--muted);line-height:1.6}.attempt-row{display:grid;grid-template-columns:12px minmax(0,1fr) auto;align-items:center;gap:10px;border-bottom:1px solid var(--border);padding:10px 0}.empty-text{margin:0;border:1px dashed var(--border);border-radius:8px;background:var(--surface-muted);padding:12px;font-size:13px;line-height:1.5;text-align:center}.attempt-row:last-child{border-bottom:0}.attempt-row strong,.attempt-row p,.attempt-row time{margin:0}.attempt-row p,.attempt-row time{color:var(--muted);font-size:12px}.status-dot{width:10px;height:10px;border-radius:50%}.status-dot.correct{background:var(--success)}.status-dot.wrong{background:var(--warning)}.part-stat-row{display:grid;grid-template-columns:76px minmax(0,1fr) 42px;align-items:center;gap:10px;border-bottom:1px solid var(--border);padding:12px 0}.part-stat-row:last-child{border-bottom:0}.part-stat-row strong,.part-stat-row p{margin:0}.part-stat-row p,.part-stat-row span{color:var(--muted);font-size:12px}.weekly-chart{height:154px;display:grid;grid-template-columns:repeat(7,minmax(0,1fr));align-items:end;gap:7px;border-radius:8px;background:var(--surface-muted);padding:12px 10px 10px}.weekly-bar-item{min-width:0;height:100%;display:grid;grid-template-rows:18px 1fr 18px;align-items:end;justify-items:center;gap:5px}.weekly-bar-value{color:var(--muted);font-size:10px;font-weight:800;line-height:1;white-space:nowrap}.weekly-bar-track{width:100%;height:96px;display:flex;align-items:flex-end;justify-content:center}.weekly-bar-track span{width:min(100%,26px);border-radius:7px 7px 3px 3px;background:#9fc3e8}.weekly-bar-item.empty .weekly-bar-track span{background:transparent}.weekly-bar-item.empty .weekly-bar-value{color:#a7b3c2}.weekly-bar-item.today .weekly-bar-track span{background:var(--indigo)}.weekly-bar-item strong{color:var(--muted);font-size:11px;line-height:1}.weekly-bar-item.today strong{color:var(--indigo)}.loading-screen{width:min(100% - 36px,420px);min-height:100vh;margin:0 auto;padding:calc(20px + env(safe-area-inset-top)) 0 calc(20px + env(safe-area-inset-bottom));display:grid;place-items:center;align-content:center;gap:10px;color:var(--accent-strong);text-align:center}.loading-indicator{display:inline-grid;place-items:center;color:var(--accent)}.storage-error-screen{gap:12px;color:var(--text)}.storage-error-screen h1{margin:0 0 8px;font-size:20px;line-height:1.35}.storage-error-screen p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}.storage-error-screen .secondary-action{width:min(100%,240px)}@media(hover:hover)and (pointer:fine){.primary-action:not(:disabled):hover{background:var(--action-pressed);box-shadow:0 10px 22px #2664c73d}.secondary-action:not(:disabled):hover,.icon-button:hover{border-color:#cbd7e4;background:var(--surface-hover)}.weak-challenge .secondary-action:not(:disabled):hover{border-color:#b65c0057;background:#fff3d4;color:#733700}.secondary-action.danger:not(:disabled):hover{border-color:#b423184d;background:var(--danger-soft)}.session-row:hover,.choice-button:not(:disabled):not(.selected):hover,.sentence-button:not(:disabled):not(.selected):not(.expected):hover{border-color:#cbd7e4;background:var(--surface-hover);box-shadow:0 8px 18px #19273414}.bottom-nav button:not(.active):hover{background:var(--surface-muted);color:var(--text)}.tag-grid button:not(.selected):hover{border-color:#7a271a61;background:#fff8f7}}.primary-action:not(:disabled):active,.secondary-action:not(:disabled):active,.icon-button:active,.session-row:active,.choice-button:not(:disabled):active,.sentence-button:not(:disabled):active,.tag-grid button:active{transform:translateY(1px)}@media(prefers-reduced-motion:no-preference){.loading-indicator{animation:loading-pulse 1.2s ease-in-out infinite}@keyframes loading-pulse{0%,to{opacity:.55;transform:scale(.96)}50%{opacity:1;transform:scale(1)}}}@media(max-width:360px){.screen,.session-header,.session-content,.sticky-action{padding-right:14px;padding-left:14px}.top-header h1,.session-complete h1{font-size:22px}.metric-card strong{font-size:20px}.goal-dashboard{grid-template-columns:120px minmax(0,1fr);gap:12px}.goal-ring{width:120px}.goal-ring>div{width:88px}.goal-ring strong{font-size:25px}.score-card{padding-left:12px}.score-card strong{font-size:27px}.weekly-kpis .metric-card strong{font-size:17px}.weekly-kpis .metric-card{padding:10px 8px}.review-queue-row,.weak-challenge{grid-template-columns:1fr}.review-queue-side{align-items:flex-start;flex-direction:row;flex-wrap:wrap}.weak-challenge .secondary-action{width:100%}.session-row{grid-template-columns:38px minmax(0,1fr)}.session-row em{grid-column:2;justify-self:start;text-align:left}.passage-title-row{align-items:flex-start;flex-direction:column;gap:4px}.part-stat-row{grid-template-columns:68px minmax(0,1fr) 38px}}@media(max-width:340px){.goal-dashboard{grid-template-columns:1fr}.goal-ring{justify-self:center}.score-card{border-top:1px solid var(--border);border-left:0;padding-top:12px;padding-left:0}.today-stat-row,.metric-grid.weekly-kpis{gap:6px}}@media(min-width:768px){.screen,.session-header,.session-content,.sticky-action,.session-complete{width:min(100%,520px)}.bottom-nav{width:min(100%,520px);right:auto;left:50%;transform:translate(-50%);border-right:1px solid var(--border);border-left:1px solid var(--border)}}