:root{--primary: #2563eb;--primary-light: #eff6ff;--text: #111827;--text-muted: #6b7280;--border: #e5e7eb;--danger: #dc2626;--amber: #d97706}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--text);background:#fff}.app-main{min-height:100vh;padding:16px 16px 80px}.screen{max-width:640px;margin:0 auto}.screen-title{font-size:28px;font-weight:600;margin:8px 0 16px}.tabbar{position:fixed;inset:auto 0 0;display:flex;background:#fff;border-top:1px solid var(--border);padding-top:4px}.tab{flex:1;text-align:center;padding:12px 4px;font-size:12px;font-weight:500;text-decoration:none;color:var(--text-muted)}.tab-active{color:var(--primary)}.login{max-width:420px;margin:0 auto;padding:48px 24px;display:flex;flex-direction:column;gap:24px;min-height:100vh;justify-content:center}.login-title{font-size:36px;font-weight:600;text-align:center;color:var(--primary);margin:0}.login-form{display:flex;flex-direction:column;gap:16px}.field{display:flex;flex-direction:column;gap:6px}.field-label{font-size:14px;font-weight:500;color:var(--text-muted)}.field-input{width:100%;padding:14px 16px;font-size:16px;border:1px solid var(--border);border-radius:12px;background:#fff;color:var(--text)}.field-input:focus{outline:none;border-color:var(--primary)}.btn-primary{width:100%;padding:16px;font-size:16px;font-weight:600;color:#fff;background:var(--primary);border:none;border-radius:16px;cursor:pointer}.btn-primary:disabled{background:var(--border);color:var(--text-muted);cursor:not-allowed}.login-error{color:var(--danger);font-size:14px;margin:0;text-align:center}.login-toggle{background:none;border:none;color:var(--primary);font-size:14px;cursor:pointer;padding:8px}.screen-subtitle{margin:-8px 0 20px;color:var(--text-muted);font-size:15px}.card{display:flex;flex-direction:column;gap:12px;border:1px solid var(--border);border-radius:16px;padding:16px;margin-bottom:24px}.section-label{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);margin:0 0 12px}.card .section-label{margin:0}.sub-label{font-size:14px;font-weight:500;color:var(--text-muted);margin:0}.muted{color:var(--text-muted);font-size:15px}.activity-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}.activity-card{border:1px solid var(--border);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:8px}.activity-row{display:flex;align-items:center;justify-content:space-between}.activity-name{font-size:16px;font-weight:600}.row-actions{display:flex;gap:8px}.icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:#fff;font-size:16px;cursor:pointer}.icon-edit{color:var(--primary)}.icon-delete{color:var(--danger)}.btn-save{flex:1;padding:12px;font-size:15px;font-weight:600;color:#166534;background:#dcfce7;border:1px solid #86efac;border-radius:12px;cursor:pointer}.btn-save:disabled{opacity:.5;cursor:not-allowed}.btn-cancel{flex:1;padding:12px;font-size:15px;font-weight:600;color:var(--text-muted);background:#f3f4f6;border:1px solid var(--border);border-radius:12px;cursor:pointer}.account-card{gap:4px}.account-name{font-size:18px;font-weight:600}.account-email{color:var(--text-muted);font-size:15px}.btn-logout{width:100%;padding:16px;font-size:16px;font-weight:600;color:var(--danger);background:#fff;border:1px solid var(--danger);border-radius:16px;cursor:pointer}.history-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.pill-btn{padding:10px 16px;font-size:14px;font-weight:600;color:#fff;background:var(--primary);border:none;border-radius:999px;cursor:pointer;white-space:nowrap}.session-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}.session-card{border:1px solid var(--border);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:12px}.session-main{display:flex;flex-direction:column;gap:4px}.session-name{font-size:16px;font-weight:600}.session-datetime{font-size:14px;color:var(--text-muted)}.session-badges{display:flex;flex-wrap:wrap;gap:8px}.pill{display:inline-flex;align-items:center;padding:4px 10px;font-size:13px;font-weight:600;border-radius:999px}.pill-grey{background:#f3f4f6;color:var(--text-muted)}.pill-blue{background:var(--primary-light);color:var(--primary)}