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24px 80px}.shared-loading{min-height:40vh;color:var(--accent);justify-content:center;align-items:center;display:flex}.shared-error{text-align:center;padding:80px 24px}.shared-error h2{color:var(--ink);margin:0 0 8px;font-size:24px;font-weight:800}.shared-error p{color:var(--ink-muted);margin:0 0 24px}.shared-card{background:var(--bg-elev);border:1px solid var(--line);box-shadow:var(--shadow-soft);border-radius:16px;padding:36px 32px}.shared-meta{align-items:center;gap:12px;margin-bottom:20px;display:flex}.shared-badge{text-transform:uppercase;letter-spacing:.04em;border-radius:8px;align-items:center;gap:5px;padding:4px 10px;font-size:12px;font-weight:700;display:inline-flex}.shared-badge-solve{background:var(--accent-soft);color:var(--accent)}.shared-badge-chat{color:#3b82f6;background:#3b82f61f}.shared-time{color:var(--ink-muted);font-size:13px}.shared-title{letter-spacing:-.02em;color:var(--ink);margin:0 0 20px;font-size:24px;font-weight:800;line-height:1.3}.shared-prompt{background:var(--bg);border:1px solid var(--line);color:var(--ink);border-radius:12px;margin-bottom:28px;padding:16px 20px;font-size:15px}.shared-section{border-top:1px solid var(--line);margin-top:28px;padding-top:24px}.shared-section h2{color:var(--ink);letter-spacing:-.01em;margin:0 0 14px;font-size:16px;font-weight:700}.shared-steps{flex-direction:column;gap:18px;margin:0;padding-left:24px;display:flex}.shared-step h3{color:var(--accent);margin:0 0 6px;font-size:14px;font-weight:700}.shared-step>div{color:var(--ink);font-size:15px;line-height:1.7}.shared-formula{background:var(--bg);text-align:center;border-radius:10px;margin:10px 0;padding:12px 16px;overflow-x:auto}.shared-concepts{color:var(--ink);flex-direction:column;gap:8px;margin:0;padding-left:20px;font-size:14px;line-height:1.6;display:flex}.shared-chat-thread{flex-direction:column;gap:16px;margin-top:20px;display:flex}.shared-chat-msg{flex-direction:column;gap:4px;display:flex}.shared-chat-role{text-transform:uppercase;letter-spacing:.04em;color:var(--ink-muted);font-size:12px;font-weight:700}.shared-chat-msg-user .shared-chat-content{background:var(--user-bubble);border-radius:14px 14px 4px;padding:12px 16px;font-size:15px;line-height:1.6}.shared-chat-msg-assistant .shared-chat-content{padding:4px 0;font-size:15px;line-height:1.7}@media (max-width:720px){.shared-nav{padding:12px 16px}.shared-body{padding:24px 16px 60px}.shared-card{border-radius:14px;padding:24px 20px}.shared-title{font-size:20px}}.settings-page{background:var(--bg);min-height:100vh;color:var(--ink);max-width:640px;margin:0 auto;padding:32px 24px}.settings-header{flex-direction:column;gap:8px;margin-bottom:32px;display:flex}.settings-back{color:var(--accent);align-items:center;gap:6px;font-size:14px;text-decoration:none;display:inline-flex}.settings-title{font-size:28px;font-weight:700}.settings-content{flex-direction:column;gap:24px;display:flex}.settings-section{background:var(--bg-elev);border:1px solid var(--line);border-radius:12px;padding:16px}.settings-section-title{color:var(--ink-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px;font-size:14px;font-weight:600}.settings-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:8px 0;font-size:14px;display:flex}.settings-row:last-child{border-bottom:none}.settings-value{color:var(--ink-muted)}.settings-theme-btn{background:var(--bg-elev-2,var(--panel));border:1px solid var(--line);color:var(--ink);cursor:pointer;border-radius:8px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;display:inline-flex}.settings-danger-btn{color:var(--danger);cursor:pointer;background:#ef44441a;border:1px solid #ef44444d;border-radius:8px;align-items:center;gap:4px;padding:6px 12px;font-size:13px;display:inline-flex}.settings-danger-btn:hover{background:#ef444433}.review-queue{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.review-card{background:var(--bg-elev);border:1px solid var(--line);border-radius:8px;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;display:flex}.review-question{flex:1;font-size:13px}.review-actions{gap:4px;display:flex}