:root,[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--background:#f5f7f8;--surface:#fff;--surface-muted:#edf7f5;--ink:#17201d;--muted:#65726d;--line:#d9e1df;--accent:#0f766e;--accent-strong:#115e59;--focus:#0f766e33;--danger:#b42318;--danger-surface:#fff1f0;--success:#157f3b;--success-surface:#edf9f1;--warning-surface:#fff9e8;--shadow:0 18px 44px #1824211a}[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--background:#0c1413;--surface:#131c1b;--surface-muted:#1a2624;--ink:#e7efed;--muted:#94a39d;--line:#28332f;--accent:#2dd4bf;--accent-strong:#5eead4;--focus:#2dd4bf47;--danger:#f87171;--danger-surface:#2a1212;--success:#4ade80;--success-surface:#102619;--warning-surface:#2a2107;--shadow:0 18px 44px #00000080}*{box-sizing:border-box}html{background:var(--background);min-height:100%}body{min-height:100vh;color:var(--ink);background:linear-gradient(180deg, #fff 0, #fff0 300px), var(--background);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,textarea{font:inherit}button{cursor:pointer}button:disabled,textarea:disabled{cursor:not-allowed;opacity:.68}.app-shell{width:min(920px,100% - 32px);margin:0 auto;padding:40px 0}.trainer-header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:22px;display:flex}.eyebrow{color:var(--accent-strong);letter-spacing:0;text-transform:uppercase;margin:0 0 8px;font-size:.78rem;font-weight:700}h1,h2,p{overflow-wrap:anywhere}h1{margin:0;font-size:2.35rem;line-height:1.05}h2{margin:0;font-size:4.4rem;line-height:.98}.icon-button,.submit-button{border:0;border-radius:8px;justify-content:center;align-items:center;gap:8px;min-height:44px;font-weight:700;display:inline-flex}.icon-button{color:var(--accent-strong);background:var(--surface);flex:none;padding:0 14px;box-shadow:0 1px #00000014}.icon-button:hover:not(:disabled){background:var(--surface-muted)}.settings-panel,.exercise-panel,.answer-panel,.feedback-panel{border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);border-radius:8px}.settings-panel{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:18px;padding:20px 24px;display:grid}.setting-field{flex-direction:column;gap:6px;min-width:0;display:flex}.setting-field label{color:var(--muted);letter-spacing:0;text-transform:uppercase;font-size:.78rem;font-weight:700}.setting-field select{border:1px solid var(--line);background:var(--surface);width:100%;color:var(--ink);font:inherit;appearance:none;cursor:pointer;border-radius:8px;padding:10px 12px;transition:border-color .12s,box-shadow .12s}.setting-field select:focus-visible{border-color:var(--accent);box-shadow:0 0 0 4px var(--focus);outline:none}.setting-field select:disabled{cursor:not-allowed;opacity:.6;background:var(--surface-muted)}.setting-hint{color:var(--muted);font-size:.75rem}.setting-hint a{color:var(--accent-strong);font-weight:600}.setting-field--full{grid-column:1/-1}.api-key-row{grid-template-columns:minmax(0,1fr) auto auto;align-items:stretch;gap:8px;display:grid}.api-key-row input{border:1px solid var(--line);background:var(--surface);width:100%;color:var(--ink);font:inherit;border-radius:8px;padding:10px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace}.api-key-row input:focus-visible{border-color:var(--accent);box-shadow:0 0 0 4px var(--focus);outline:none}.api-key-row input:disabled{cursor:not-allowed;opacity:.6;background:var(--surface-muted)}.api-key-toggle{height:auto;padding:0 12px}.ghost-button{border:1px solid var(--line);height:auto;color:var(--muted);font:inherit;background:0 0;border-radius:8px;padding:0 14px}.ghost-button:hover:not(:disabled){background:var(--surface-muted);color:var(--ink)}.auth-shell{place-items:center;min-height:100vh;padding:32px;display:grid}.auth-card{border:1px solid var(--line);background:var(--surface);width:min(440px,100%);box-shadow:var(--shadow);border-radius:12px;flex-direction:column;gap:24px;padding:32px;display:flex}.auth-card h1{margin:0;font-size:1.6rem}.auth-lede{color:var(--muted);margin:12px 0 0;line-height:1.55}.auth-meta{color:var(--muted);margin:16px 0 0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace;font-size:.85rem}.auth-error{border:1px solid var(--danger);background:var(--danger-surface);color:var(--danger);border-radius:8px;margin:0;padding:12px 14px;font-size:.92rem}.auth-success{border:1px solid var(--success);background:var(--success-surface);color:var(--success);border-radius:8px;align-items:center;margin:0;padding:12px 14px;font-size:.92rem;display:inline-flex}.main-nav{border:1px solid var(--line);background:var(--surface);border-radius:999px;gap:4px;margin-bottom:18px;padding:4px;display:inline-flex;box-shadow:0 1px #0000000a}.main-nav-item{color:var(--muted);border-radius:999px;align-items:center;gap:6px;padding:8px 16px;font-size:.9rem;font-weight:600;text-decoration:none;transition:background .12s,color .12s;display:inline-flex}.main-nav-item:hover{background:var(--surface-muted);color:var(--ink)}.main-nav-item.is-active{background:var(--accent);color:#fff}.history-stats{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:18px;display:grid}.history-stat{border:1px solid var(--line);background:var(--surface);border-radius:10px;flex-direction:column;gap:4px;padding:16px 20px;display:flex;box-shadow:0 1px #0000000a}.history-stat-label{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:.78rem;font-weight:700}.history-stat-value{color:var(--ink);font-size:1.6rem;font-weight:700}.history-empty{text-align:center;color:var(--muted);padding:32px}.history-list{flex-direction:column;gap:14px;display:flex}.history-entry{border:1px solid var(--line);background:var(--surface);border-radius:10px;flex-direction:column;gap:12px;padding:20px 24px;display:flex;box-shadow:0 1px #0000000a}.history-correct{border-left:4px solid var(--success)}.history-needs_revision{border-left:4px solid var(--danger)}.history-entry-header{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.history-entry-header h2{margin:0;font-size:1.6rem}.history-meta{color:var(--muted);margin:4px 0 0;font-size:.85rem}.history-block{flex-direction:column;gap:4px;display:flex}.history-block-label{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:.75rem;font-weight:700}.history-block p{margin:0;line-height:1.5}.history-foot{color:var(--muted);margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace;font-size:.78rem}.site-header{z-index:50;position:fixed;top:16px;right:16px}.settings-menu{display:inline-block;position:relative}.settings-trigger{border:1px solid var(--line);background:var(--surface);width:40px;height:40px;color:var(--ink);border-radius:999px;justify-content:center;align-items:center;padding:0;transition:background .12s,border-color .12s;display:inline-flex;box-shadow:0 2px 6px #0000000f}.settings-trigger:hover{background:var(--surface-muted)}.settings-trigger:focus-visible{border-color:var(--accent);box-shadow:0 0 0 4px var(--focus);outline:none}.settings-popover{border:1px solid var(--line);background:var(--surface);width:240px;box-shadow:var(--shadow);border-radius:12px;flex-direction:column;gap:4px;padding:8px;display:flex;position:absolute;top:calc(100% + 8px);right:0}.settings-section{flex-direction:column;gap:4px;padding:6px 4px;display:flex}.settings-section+.settings-section{border-top:1px solid var(--line)}.settings-section-label{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin:0 0 4px;padding:0 8px;font-size:.72rem;font-weight:700}.settings-theme-group{grid-template-columns:1fr;gap:2px;display:grid}.settings-theme-option{color:var(--ink);font:inherit;text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;grid-template-columns:16px 1fr 16px;align-items:center;gap:10px;padding:8px 10px;display:grid}.settings-theme-option:hover{background:var(--surface-muted)}.settings-theme-option.is-active{border-color:var(--line);background:var(--surface-muted);color:var(--accent-strong)}.settings-link{width:100%;color:var(--ink);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;padding:8px 10px;text-decoration:none;display:inline-flex}.settings-link:hover{background:var(--surface-muted)}.settings-meta{color:var(--muted);word-break:break-all;margin:0 0 4px;padding:0 8px;font-size:.78rem}.admin-shell{padding-top:64px}.admin-panel{flex-direction:column;gap:16px;padding:24px 28px;display:flex}.admin-cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:18px;display:grid}.admin-card{border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);color:var(--ink);border-radius:10px;flex-direction:column;gap:8px;padding:24px;text-decoration:none;transition:transform .12s,border-color .12s;display:flex}.admin-card:hover{border-color:var(--accent);transform:translateY(-1px)}.admin-card h2{margin:0;font-size:1.15rem}.admin-card p{color:var(--muted);margin:0;font-size:.9rem;line-height:1.5}.admin-table-wrapper{overflow-x:auto}.admin-table{border-collapse:collapse;width:100%;font-size:.92rem}.admin-table th,.admin-table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;padding:10px 12px}.admin-table th{color:var(--muted);letter-spacing:.04em;text-transform:uppercase;font-size:.78rem;font-weight:700}.admin-email{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace;font-size:.88rem}.admin-meta-cell{white-space:nowrap;color:var(--muted);font-size:.85rem}.admin-pill{background:var(--surface-muted);color:var(--muted);border-radius:999px;margin-left:8px;padding:2px 8px;font-size:.72rem;display:inline-block}.admin-actions{flex-wrap:wrap;gap:6px;display:flex}.admin-actions .ghost-button{padding:4px 10px;font-size:.85rem}.admin-actions .ghost-button.approve:not(:disabled){border-color:var(--success);color:var(--success)}.admin-actions .ghost-button.disable:not(:disabled){border-color:var(--muted)}.admin-actions .ghost-button.delete:not(:disabled){border-color:var(--danger);color:var(--danger)}.status-badge{border-radius:999px;padding:2px 10px;font-size:.78rem;font-weight:600;display:inline-block}.status-pending{background:var(--warning-surface);color:#8a6d05}[data-theme=dark] .status-pending{color:#facc15}.status-approved{background:var(--success-surface);color:var(--success)}.status-disabled{background:var(--surface-muted);color:var(--muted)}.ai-config-form{flex-direction:column;gap:16px;display:flex}.ai-config-panel{box-shadow:none;background:0 0;border:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:0;padding:0;display:grid}@media (max-width:680px){.ai-config-panel{grid-template-columns:1fr}}.exercise-panel{padding:28px}.verb-row{grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:20px;display:grid}.meaning{color:var(--accent-strong);background:var(--surface-muted);border-radius:8px;margin:4px 0 0;padding:8px 12px;font-weight:700}.example-block,.prompt-block{border-top:1px solid var(--line);margin-top:24px;padding-top:20px}.example-block span,.prompt-block span,.correction span{color:var(--muted);margin-bottom:8px;font-size:.9rem;font-weight:700;display:block}.example-block p,.prompt-block p{margin:0;font-size:1.2rem;line-height:1.6}.answer-panel{gap:12px;margin-top:18px;padding:20px;display:grid}.answer-panel label{font-weight:800}.answer-panel textarea{resize:vertical;border:1px solid var(--line);width:100%;min-height:132px;color:var(--ink);background:#fbfcfc;border-radius:8px;padding:14px;line-height:1.5}.answer-panel textarea:focus{outline:3px solid var(--focus);border-color:var(--accent)}.submit-button{color:#fff;background:var(--accent);justify-self:end;padding:0 18px}.submit-button:hover:not(:disabled){background:var(--accent-strong)}.feedback-panel{margin-top:18px;padding:20px;line-height:1.6}.feedback-panel p{margin:0}.feedback-correct{background:var(--success-surface);border-color:#157f3b61}.feedback-needs_revision{background:var(--danger-surface);border-color:#b4231852}.feedback-loading{background:var(--warning-surface)}.feedback-error{color:var(--danger);border-color:#b4231852}.verdict{margin-bottom:8px;font-weight:900}.correction{background:#ffffffb8;border-radius:8px;margin-top:14px;padding:14px}.issue-list{flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none;display:flex}.issue-list li{color:var(--danger);background:#ffffffbf;border:1px solid #b4231847;border-radius:999px;padding:6px 10px;font-size:.9rem;font-weight:700}@media (max-width:680px){.app-shell{width:min(100% - 24px,920px);padding:24px 0}.trainer-header,.verb-row{grid-template-columns:1fr}.trainer-header{flex-direction:column;align-items:flex-start}h1{font-size:2rem}h2{font-size:3rem}.meaning{width:fit-content}.exercise-panel{padding:20px}.submit-button{width:100%}.settings-panel{grid-template-columns:1fr;padding:16px}}