:root{--primary-color: #1c97a6;--primary-hover: #24b3c4;--secondary-color: #9aa0a6;--background-color: #121212;--surface-color: #1e1e1e;--card-background: #1e1e1e;--border-color: #3c4043;--text-primary: #e8eaed;--text-secondary: #9aa0a6;--error-color: #f28b82;--success-color: #81c995;--shadow-light: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.5);--shadow-medium: 0 4px 6px rgba(0,0,0,.3), 0 1px 3px rgba(0,0,0,.4);--shadow-heavy: 0 10px 25px rgba(0,0,0,.5), 0 4px 10px rgba(0,0,0,.4);--border-radius: 8px;--transition: all .2s cubic-bezier(.4, 0, .2, 1);--input-background: #2d2d2d}.modern-login-container{min-height:100vh;display:flex;background:#000;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.modern-login-left{flex:1;position:relative;overflow:hidden;display:none}@media (min-width: 768px){.modern-login-left{display:flex;align-items:center;justify-content:center}}.modern-login-right{flex:1;background:var(--surface-color);display:flex;align-items:center;justify-content:center;padding:2rem}@media (min-width: 768px){.modern-login-right{flex:0 0 480px;box-shadow:-10px 0 40px #000c}}.modern-video-container{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}.modern-video-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#000000b3;z-index:2}.modern-video-container video{width:100%;height:100%;object-fit:cover}.modern-login-card{width:100%;max-width:400px;padding:48px 40px;background:var(--card-background);border-radius:var(--border-radius);border:1px solid var(--border-color)}@media (max-width: 767px){.modern-login-card{padding:32px 24px;box-shadow:none}}.modern-logo{text-align:center;margin-bottom:32px}.modern-logo img{max-height:48px;width:auto}.modern-logo h2{font-size:32px;font-weight:700;background:linear-gradient(135deg,var(--primary-color),var(--primary-hover));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0}.modern-title{font-size:28px;font-weight:400;color:var(--text-primary);text-align:center;margin-bottom:8px;letter-spacing:-.5px}.modern-subtitle{font-size:16px;color:var(--text-secondary);text-align:center;margin-bottom:32px;line-height:1.5}.modern-form-group{margin-bottom:24px;position:relative}.modern-form-label{display:block;font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:8px;transition:var(--transition)}.modern-form-input{width:100%;height:48px;padding:12px 16px;border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:16px;color:var(--text-primary);background:var(--input-background);transition:var(--transition);box-sizing:border-box}.modern-form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #1c97a633;background:var(--surface-color)}.modern-form-input:hover{border-color:var(--primary-color);background:var(--surface-color)}.modern-form-input::placeholder{color:var(--text-secondary);opacity:.8}.modern-form-input.is-invalid{border-color:var(--error-color)}.modern-form-input.is-invalid:focus{border-color:var(--error-color);box-shadow:0 0 0 3px #d930251a}.invalid-feedback{color:var(--error-color);font-size:14px;margin-top:4px}.modern-btn{width:100%;height:48px;padding:12px 24px;border:none;border-radius:var(--border-radius);font-size:16px;font-weight:500;letter-spacing:.25px;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden}.modern-btn-primary{background:var(--primary-color);color:#fff}.modern-btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-medium)}.modern-btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-light)}.modern-btn-primary:disabled{background:var(--border-color);cursor:not-allowed;transform:none;box-shadow:none}.modern-btn-loading{color:transparent;pointer-events:none}.modern-btn-loading:after{content:"";position:absolute;width:20px;height:20px;top:50%;left:50%;margin-left:-10px;margin-top:-10px;border:2px solid white;border-radius:50%;border-top-color:transparent;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.modern-message{padding:12px 16px;border-radius:var(--border-radius);margin-bottom:24px;font-size:14px;line-height:1.5;animation:slideIn .3s ease-out}@keyframes slideIn{0%{transform:translateY(-10px);opacity:0}to{transform:translateY(0);opacity:1}}.modern-message-error{background:#f28b821a;color:var(--error-color);border:1px solid rgba(242,139,130,.3)}.modern-message-success{background:#81c9951a;color:var(--success-color);border:1px solid rgba(129,201,149,.3)}.modern-footer{margin-top:32px;padding-top:24px;border-top:1px solid var(--border-color);text-align:center}.modern-footer-text{font-size:14px;color:var(--text-secondary);line-height:1.5}.modern-footer-link{color:var(--primary-color);text-decoration:none;transition:var(--transition)}.modern-footer-link:hover{color:var(--primary-hover);text-decoration:underline}.modern-env-badge{display:inline-block;padding:4px 12px;background:var(--input-background);color:var(--primary-color);border-radius:12px;font-size:12px;font-weight:500;margin-top:8px;border:1px solid var(--primary-color)}.modern-copyright{position:absolute;bottom:20px;right:20px;color:#fffc;font-size:14px;font-style:italic;z-index:3}body.light-mode{--primary-color: #1c97a6;--primary-hover: #158a97;--secondary-color: #5f6368;--background-color: #ffffff;--surface-color: #f8f9fa;--card-background: #ffffff;--border-color: #dadce0;--text-primary: #202124;--text-secondary: #5f6368;--error-color: #d93025;--success-color: #137333;--shadow-light: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.24);--shadow-medium: 0 4px 6px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.06);--shadow-heavy: 0 10px 25px rgba(0,0,0,.1), 0 4px 10px rgba(0,0,0,.06);--input-background: #ffffff}body.light-mode .modern-login-container{background:linear-gradient(135deg,#667eea,#764ba2)}body.light-mode .modern-login-right{background:var(--background-color);box-shadow:var(--shadow-heavy)}body.light-mode .modern-video-overlay{background:#0000004d}body.light-mode .modern-message-error{background:#fce8e6;border:1px solid #f5c6cb}body.light-mode .modern-message-success{background:#e6f4ea;border:1px solid #c3e6cb}body.light-mode .modern-env-badge{background:var(--surface-color);color:var(--text-secondary);border:1px solid var(--border-color)}