:root{--bg-main:#f8fafc;--bg-card:#fff;--text-main:#0f172a;--text-muted:#475569;--border-color:#e2e8f0;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#eff6ff;--secondary:#64748b;--secondary-hover:#475569;--danger:#dc2626;--danger-hover:#b91c1c;--warning:#d97706;--warning-bg:#fffbeb;--success:#16a34a;--success-bg:#f0fdf4;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--touch-target-min:44px;--bottom-nav-height:65px;--bottom-nav-clearance:calc(var(--bottom-nav-height) + env(safe-area-inset-bottom,0px) + 16px)}:root *,:root :before,:root :after{box-sizing:border-box;margin:0;padding:0}:root html,:root body{background-color:var(--bg-main);width:100%;max-width:100%;color:var(--text-main);-webkit-tap-highlight-color:transparent;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;overflow-x:hidden}:root .sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}:root :focus-visible{outline:3px solid var(--primary);outline-offset:2px}:root button{cursor:pointer;background:0 0;border:none;font-family:inherit;font-size:1rem}:root .app-container{width:100%;max-width:100%;min-height:100vh;padding-bottom:var(--bottom-nav-clearance);flex-direction:column;display:flex}:root .app-header{background-color:var(--bg-card);border-bottom:1px solid var(--border-color);z-index:10;box-shadow:var(--shadow-sm);padding:12px 16px;position:sticky;top:0}:root .header-container{max-width:900px;margin:0 auto}:root .lesson-picker{border-top:1px solid var(--border-color);padding-top:14px}:root .lesson-list{gap:8px;margin-top:12px;display:grid}:root .lesson-row{border-radius:12px;grid-template-columns:36px 1fr auto;align-items:center;gap:10px;width:100%;padding:11px 12px;display:grid}:root .lesson-number{color:var(--primary);font-variant-numeric:tabular-nums;font-weight:800}:root .phrase-picker{background:var(--bg-main);border-radius:12px;margin-top:14px;padding:14px}:root .phrase-chip-list{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}:root .cefr-track{border:1px solid var(--border-color);background:var(--bg-main);border-radius:13px;margin:14px 0 16px;padding:13px}:root .cefr-track-heading{color:var(--text-muted);justify-content:space-between;gap:12px;font-size:.84rem;display:flex}:root .cefr-track-heading strong{color:var(--text)}:root .cefr-level-list{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:10px;display:grid}:root .cefr-level{background:var(--bg-card);text-align:center;border-radius:10px;flex-direction:column;justify-content:center;gap:3px;min-height:62px;padding:9px;display:flex}:root .cefr-level strong{color:var(--primary);font-size:1.05rem}:root .cefr-level span,:root .cefr-level small{font-size:.72rem}:root .cefr-level small{color:var(--text-muted)}:root .phrase-chip{color:var(--text);border-radius:999px;padding:8px 11px;font-size:.85rem}:root .selected-phrase-hint,:root .loading-inline,:root .error-inline{margin:10px 0 0;font-size:.88rem}:root .error-inline{color:#b42318}:root .target-phrase-card{background:linear-gradient(135deg,#f2f7ff,#fff);border:1px solid #cfe1ff;border-radius:18px;max-width:920px;margin:0 auto 18px;padding:20px;display:block}:root .target-phrase-card .eyebrow{color:var(--primary);letter-spacing:.08em;text-transform:uppercase;font-size:.75rem;font-weight:800}:root .target-phrase-card h2{margin:12px 0 2px;font-size:clamp(1.35rem,3vw,2rem)}:root .target-phrase-phonetic{color:var(--primary);font-family:ui-monospace,SFMono-Regular,Consolas,monospace}:root .progress-module-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px;display:grid}:root .progress-module-card{border:1px solid var(--border-color);background:var(--bg-card);border-radius:14px;padding:14px}:root .progress-module-title span{color:var(--primary);font-weight:800}:root .progress-bar{background:var(--bg-main);border-radius:999px;height:7px;margin:10px 0 12px;overflow:hidden}:root .progress-bar span{border-radius:inherit;background:var(--primary);height:100%;transition:width .25s;display:block}:root .progress-lesson-list{gap:7px;display:grid}:root .progress-lesson-row{grid-template-columns:22px 1fr auto;align-items:center;gap:6px;font-size:.84rem;display:grid}:root .progress-lesson-row small{color:var(--text-muted)}:root .progress-status{font-weight:800}:root .progress-status.complete{color:#138a52}:root .progress-status.open{color:var(--primary)}:root .progress-status.locked{filter:grayscale();opacity:.65}@media (width<=640px){:root .module-grid,:root .progress-module-list{grid-template-columns:1fr}:root .section-heading-row,:root .progress-section-header,:root .target-phrase-meta,:root .lesson-picker-header,:root .phrase-picker-title{flex-direction:column;align-items:flex-start}:root .lesson-row{grid-template-columns:30px 1fr}:root .lesson-phrase-count{grid-column:2}:root .phrase-chip{width:100%}:root .cefr-level-list{grid-template-columns:repeat(3,minmax(0,1fr))}:root .cefr-track-heading{flex-direction:column;align-items:flex-start}}:root .app-header .header-container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;display:flex}:root .app-header .brand{align-items:center;gap:10px;display:flex}:root .app-header .brand-title{font-size:1.35rem;font-weight:800;line-height:1.2}:root .app-header .header-nav{flex-wrap:wrap;align-items:center;gap:8px;display:flex}:root .app-header .nav-tab{border:1px solid var(--border-color);background:var(--bg-card);min-height:44px;color:var(--text-main);border-radius:999px;align-items:center;padding:8px 12px;font-size:.95rem;text-decoration:none;display:inline-flex}:root .app-header .nav-tab.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700}:root .app-header .session-badge{flex-wrap:wrap;align-items:center;gap:6px 8px;display:flex}:root .app-header .end-session-btn{border:1px solid var(--border-color);background:var(--bg-card);border-radius:999px;align-items:center;min-height:44px;padding:8px 12px;display:inline-flex}:root .bottom-nav-bar{padding:6px 8px calc(6px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--border-color);z-index:100;background:#fff;justify-content:space-around;align-items:stretch;gap:2px;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -2px 10px #0000000a}:root .bottom-nav-tab{color:#64748b;text-align:center;border-radius:12px;flex-direction:column;flex:1 1 0;justify-content:center;align-items:center;gap:2px;min-width:0;min-height:52px;padding:6px 2px;font-size:.72rem;font-weight:600;display:flex}:root .bottom-nav-tab.active{color:var(--primary);font-weight:800}:root .bottom-nav-icon{font-size:1.3rem;line-height:1}:root .r02-learning button{border:1px solid var(--border-color);background:var(--bg-card);min-height:44px;color:var(--text-main);text-align:left;border-radius:12px;padding:8px 12px}:root .r02-learning button:disabled{color:#475569;cursor:not-allowed;opacity:1;background:#f1f5f9}:root .r02-learning .r02-choice{text-align:center;border-radius:999px;align-items:center;margin:0 8px 8px 0;display:inline-flex}:root .r02-learning .r02-choice[aria-pressed=true]{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700}:root .r02-learning ul{padding-left:20px}:root .r02-learning li{margin-bottom:4px}:root .r02-learning li.is-locked{color:#475569}:root .r02-learning select{border:1px solid var(--border-color);background:var(--bg-card);border-radius:12px;min-height:44px;padding:8px 10px;font-size:1rem}:root .app-error-toast{color:#991b1b;background:#fef2f2;border:1px solid #fecaca;border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;padding:12px 14px;display:flex}@media (width<=480px){:root .app-header .header-container{flex-direction:column;align-items:flex-start}:root .bottom-nav-tab{font-size:.68rem}}:root .modal-overlay{z-index:200;padding:16px;padding-bottom:calc(16px + env(safe-area-inset-bottom,0px));background:#0f172a80;justify-content:center;align-items:center;display:flex;position:fixed;inset:0;overflow-y:auto}:root .modal-content{width:100%;max-height:88vh;max-height:calc(100dvh - 32px - env(safe-area-inset-bottom,0px));background:#fff;border-radius:24px;flex-direction:column;display:flex;overflow:hidden;box-shadow:0 20px 40px #0003}:root .modal-header{flex-shrink:0}:root .modal-body{min-height:0;overflow-y:auto}:root .modal-footer{flex-shrink:0}:root .modal-close-btn{min-width:44px;min-height:44px}:root .floating-dictionary-btn{right:16px;bottom:calc(var(--bottom-nav-height) + env(safe-area-inset-bottom,0px) + 12px);z-index:90;background:var(--primary);color:#fff;min-height:44px;box-shadow:var(--shadow-md);border-radius:999px;align-items:center;padding:10px 16px;font-weight:700;display:inline-flex;position:fixed}:root .action-dock-senior{bottom:calc(20px + env(safe-area-inset-bottom,0px))!important}