:root{--background:#fff;--sidebar-bg:#f9fafb;--foreground:#111827;--foreground-muted:#6b7280;--border-color:#e5e7eb;--primary:#000;--primary-hover:#333;--primary-fg:#fff;--assistant-bg:#fff;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000000d, 0 2px 4px -1px #00000008;--shadow-float:0 10px 30px -5px #00000014;--sidebar-width:280px;--app-height:100vh}*{box-sizing:border-box;margin:0;padding:0}html{width:100%;height:100%;overflow:hidden}body{background-color:var(--background);color:var(--foreground);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:17px;line-height:1.55;overflow:hidden}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}.app-container{height:var(--app-height);width:100vw;display:flex;overflow:hidden}.main-content{background-color:var(--background);flex-direction:column;flex:1;height:100%;display:flex;position:relative}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}button:disabled{cursor:not-allowed;opacity:.5}input,textarea{color:inherit;background:0 0;border:none;outline:none;font-family:inherit}.landing-wrap{background:linear-gradient(165deg,#f0f6ff 0%,#e8f0fe 40%,#dbeafe 70%,#c7d8ef 100%);width:100vw;min-width:100vw;height:100vh;min-height:100vh;position:fixed;top:0;left:0;overflow:hidden}.landing-user-bar{z-index:50;position:fixed;top:16px;right:24px}.landing-bg{z-index:1;width:100%;height:100%;position:absolute;top:0;left:0}.landing-bg svg{width:100%;height:100%;display:block}.landing-content{z-index:10;flex-direction:column;justify-content:flex-start;align-items:center;height:100%;padding-top:22vh;padding-left:40px;padding-right:40px;display:flex;position:relative}.landing-title{color:#0a1628;letter-spacing:10px;text-align:center;text-shadow:0 2px 20px #3b82f61f;margin-bottom:22px;font-size:5.5rem;font-weight:900;line-height:1.15}.landing-sub{color:#1e3a5f;text-align:center;letter-spacing:1px;max-width:580px;margin-bottom:50px;font-size:1.25rem;font-weight:400;line-height:1.8}.landing-btns{-webkit-backdrop-filter:blur(14px);background:#ffffff80;border:1px solid #ffffffa6;border-radius:28px;align-items:center;gap:16px;padding:14px 22px;display:flex;box-shadow:0 8px 32px #00000014,0 2px 8px #0000000a,inset 0 .5px #ffffffb3}.btn-primary{color:#fff;letter-spacing:1px;cursor:pointer;background:linear-gradient(135deg,#2563eb,#1d4ed8);border-radius:50px;padding:15px 52px;font-size:1.12rem;font-weight:600;transition:all .25s;box-shadow:0 3px 14px #2563eb59}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 22px #2563eb73}.btn-secondary{color:#334155;letter-spacing:1px;cursor:pointer;background:#ffffffb8;border-radius:50px;padding:15px 52px;font-size:1.12rem;font-weight:600;transition:all .25s;box-shadow:0 1px 6px #00000012}.btn-secondary:hover{background:#ffffffeb;transform:translateY(-1px)}.auth-top-right{z-index:100;position:fixed;top:20px;right:28px}.auth-btn-link{color:#1d4ed8;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);cursor:pointer;letter-spacing:.5px;background:#ffffffd9;border:1px solid #1d4ed826;border-radius:50px;padding:10px 24px;font-size:.95rem;font-weight:600;transition:all .2s;box-shadow:0 2px 10px #0000000f}.auth-btn-link:hover{background:#fff;transform:translateY(-1px);box-shadow:0 4px 16px #1d4ed82e}.user-info-bar{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffe0;border:1px solid #fff9;border-radius:50px;align-items:center;gap:12px;padding:8px 18px;display:flex;box-shadow:0 2px 12px #00000014}.user-avatar-sm{object-fit:cover;border:2px solid #1d4ed840;border-radius:50%;flex-shrink:0;width:34px;height:34px}.user-name-text{color:#1e3a5f;letter-spacing:.5px;font-size:.9rem;font-weight:600}.logout-btn{color:#ef4444;cursor:pointer;background:#ef444414;border:1px solid #ef444426;border-radius:20px;padding:6px 14px;font-size:.82rem;font-weight:500;transition:all .2s}.logout-btn:hover{background:#ef444426}.auth-overlay{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:999;background:#0006;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0}.auth-modal{background:#fff;border-radius:24px;width:460px;max-width:90vw;padding:46px 42px 38px;animation:.3s authModalIn;position:relative;box-shadow:0 25px 60px #0003}@keyframes authModalIn{0%{opacity:0;transform:translateY(20px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}.auth-modal-close{color:#9ca3af;cursor:pointer;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:1.2rem;transition:all .2s;display:flex;position:absolute;top:16px;right:18px}.auth-modal-close:hover{color:#374151;background:#f3f4f6}.auth-tabs{background:#f1f5f9;border-radius:12px;gap:0;margin-bottom:30px;padding:4px;display:flex}.auth-tab{text-align:center;color:#6b7280;cursor:pointer;border-radius:10px;flex:1;padding:12px;font-size:1.02rem;font-weight:600;transition:all .2s}.auth-tab.active{color:#1d4ed8;background:#fff;box-shadow:0 1px 4px #0000000f}.auth-form-group{margin-bottom:20px}.auth-label{color:#374151;letter-spacing:.3px;margin-bottom:7px;font-size:.95rem;font-weight:600;display:block}.auth-input{color:#111827;background:#fafbfc;border:1.5px solid #e5e7eb;border-radius:12px;outline:none;width:100%;padding:14px 18px;font-size:1.04rem;transition:all .2s}.auth-input:focus{background:#fff;border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1a}.auth-input-file-wrap{align-items:center;gap:10px;display:flex;position:relative}.auth-avatar-preview{object-fit:cover;color:#9ca3af;background:#f3f4f6;border:2px dashed #d1d5db;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:.75rem;display:flex;overflow:hidden}.auth-avatar-preview img{object-fit:cover;width:100%;height:100%}.auth-file-label{color:#6b7280;cursor:pointer;border:1.5px dashed #d1d5db;border-radius:8px;padding:6px 12px;font-size:.83rem;transition:all .2s}.auth-file-label:hover{color:#2563eb;border-color:#2563eb}.auth-submit-btn{color:#fff;cursor:pointer;letter-spacing:.5px;background:linear-gradient(135deg,#2563eb,#1d4ed8);border-radius:12px;width:100%;margin-top:6px;padding:15px;font-size:1.08rem;font-weight:600;transition:all .25s;box-shadow:0 3px 12px #2563eb4d}.auth-submit-btn:hover{transform:translateY(-1px);box-shadow:0 5px 20px #2563eb66}.auth-submit-btn:disabled{opacity:.55;cursor:not-allowed;transform:none}.auth-error-msg{color:#dc2626;text-align:center;background:#fef2f2;border:1px solid #fecaca;border-radius:10px;margin-top:12px;padding:10px 14px;font-size:.85rem}.auth-success-msg{color:#059669;text-align:center;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:10px;margin-top:12px;padding:10px 14px;font-size:.85rem}@keyframes marquee{0%{transform:translate(0)}to{transform:translate(-50%)}}