:root{--primary:#1976d2;--primary-dark:#1565c0;--primary-light:#e3f2fd;--primary-50:#e3f2fd;--primary-100:#bbdefb;--success:#388e3c;--error:#d32f2f;--error-light:#ffebee;--text-primary:#212121;--text-secondary:#616161;--text-muted:#9e9e9e;--bg-white:#fff;--bg-light:#fafafa;--bg-subtle:#f5f5f5;--border:#e0e0e0;--border-light:#eee;--shadow-sm:0 1px 3px #00000014;--shadow-md:0 4px 12px #0000001a;--shadow-lg:0 8px 24px #0000001f;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--font:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, 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100%);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.login-card{background:var(--bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);text-align:center;width:100%;max-width:420px;padding:48px 40px}.login-banner{border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:calc(100% + 80px);margin:-48px -40px 28px;display:block}.login-title{color:var(--text-primary);margin:0 0 8px;font-size:22px;font-weight:700}.login-subtitle{color:var(--text-secondary);margin:0 0 28px;font-size:14px}.login-error{background:var(--error-light);color:var(--error);border-radius:var(--radius-sm);text-align:left;margin-bottom:16px;padding:10px 14px;font-size:13px;line-height:1.5}.login-form{flex-direction:column;gap:12px;display:flex}.login-form input{border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:15px;font-family:var(--font);outline:none;padding:12px 14px;transition:border-color .2s}.login-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #1976d21a}.login-divider{color:var(--text-muted);align-items:center;gap:12px;margin:20px 0;font-size:13px;display:flex}.login-divider:before,.login-divider:after{content:"";background:var(--border);flex:1;height:1px}.login-toggle{color:var(--text-secondary);margin-top:20px;font-size:14px}.login-toggle button{color:var(--primary);cursor:pointer;background:0 0;border:none;padding:0;font-size:14px;font-weight:600}.login-toggle button:hover{text-decoration:underline}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-size:15px;font-weight:600;font-family:var(--font);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;transition:background .2s,transform 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var(--border);border-radius:var(--radius-sm);font-size:13px;font-family:var(--font);color:var(--text-secondary);cursor:pointer;align-items:center;gap:6px;padding:6px 12px;transition:all .2s;display:inline-flex}.btn-icon:hover{border-color:var(--primary);color:var(--primary)}.btn-social{border-radius:var(--radius-sm);width:100%;font-size:15px;font-weight:500;font-family:var(--font);cursor:pointer;justify-content:center;align-items:center;gap:10px;margin-bottom:10px;padding:11px 16px;transition:background .2s,box-shadow .2s;display:flex}.btn-google{background:var(--bg-white);border:1.5px solid var(--border);color:var(--text-primary)}.btn-google:hover{background:var(--bg-subtle);box-shadow:var(--shadow-sm)}.btn-apple{color:#fff;background:#000;border:1.5px solid #000}.btn-apple:hover{background:#1a1a1a}.app-header{background:var(--bg-white);border-bottom:1px solid var(--border-light);box-shadow:var(--shadow-sm);z-index:100;justify-content:space-between;align-items:center;padding:12px 32px;display:flex;position:sticky;top:0}.header-left{align-items:center;gap:14px;display:flex}.header-logo{border-radius:8px;width:40px;height:40px}.header-left h1{color:var(--text-primary);margin:0;font-size:18px;font-weight:700}.header-subtitle{color:var(--text-muted);margin-top:1px;font-size:12px;display:block}.header-right{align-items:center;gap:12px;display:flex}.user-email{color:var(--text-secondary);font-size:13px}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;width:100%;max-width:900px;margin:0 auto;padding:32px 24px}.draft-section{background:var(--bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-light);padding:32px}.section-header h2{color:var(--text-primary);margin:0 0 6px;font-size:20px;font-weight:700}.section-header p{color:var(--text-secondary);margin:0 0 20px;font-size:14px}.draft-input{border:1.5px solid 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16px;padding-bottom:8px;font-size:22px;font-weight:700}.markdown-body h2{color:var(--primary-dark);margin:28px 0 12px;font-size:18px;font-weight:700}.markdown-body h3{margin:20px 0 8px;font-size:16px;font-weight:600}.markdown-body strong{color:var(--text-primary);font-weight:700}.markdown-body ul{margin:8px 0;padding-left:20px}.markdown-body li{margin-bottom:6px}.markdown-body ol{margin:8px 0;padding-left:20px}.markdown-body blockquote{border-left:4px solid var(--primary);background:var(--primary-50);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-primary);margin:12px 0;padding:12px 16px}.markdown-body hr{border:none;border-top:2px solid var(--border-light);margin:24px 0}.markdown-body p{margin:8px 0}.revision-options{border-top:2px solid var(--border-light);margin-top:32px;padding-top:24px}.revision-prompt{color:var(--text-primary);margin:0 0 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