/* Reset and Base */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            height: 100vh;
            overflow: hidden;
            background: #1a237e;
        }

        /* Network Background */
        .network-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at center, #3949ab 0%, #1a237e 70%);
            z-index: 1;
        }

        #networkCanvas {
            width: 100%;
            height: 100%;
            display: block;
        }

        /* Trigger Buttons */
        .trigger-buttons {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 10;
            display: flex;
            gap: 20px;
        }

        .open-btn {
            padding: 15px 30px;
            background: rgba(255, 255, 255, 0.9);
            color: #1a237e;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }

        .open-btn:hover {
            background: white;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
        }

        /* Modal Overlay */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(26, 35, 126, 0.8);
            backdrop-filter: blur(10px);
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* Auth Modal */
        .auth-modal {
            width: 400px;
            max-width: 90%;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 15px;
            padding: 30px;
            transform: scale(0.8) translateY(50px);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            display: none;
        }

        .auth-modal.active {
            transform: scale(1) translateY(0);
            opacity: 1;
            display: block;
        }

        .auth-modal.slide-left {
            transform: translateX(-100px) scale(0.9);
            opacity: 0;
        }

        .auth-modal.slide-right {
            transform: translateX(100px) scale(0.9);
            opacity: 0;
        }

        /* Close Button */
        .close-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            width: 30px;
            height: 30px;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            border-radius: 50%;
            color: white;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: rotate(90deg);
        }

        /* Modal Content */
        .modal-content h2 {
            text-align: center;
            color: white;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 30px;
            animation: slideDown 0.6s ease-out;
        }

        /* Input Groups */
        .input-group {
            margin-bottom: 20px;
            animation: slideUp 0.6s ease-out;
            animation-fill-mode: both;
        }

        .input-group:nth-child(1) { animation-delay: 0.1s; }
        .input-group:nth-child(2) { animation-delay: 0.2s; }
        .input-group:nth-child(3) { animation-delay: 0.3s; }
        .input-group:nth-child(4) { animation-delay: 0.4s; }

        .input-group label {
            display: block;
            color: rgba(255, 255, 255, 0.9);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 8px;
        }

        .input-wrapper {
            position: relative;
            transition: transform 0.2s ease;
        }

        .input-wrapper input {
            width: 100%;
            padding: 12px 40px 12px 15px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 8px;
            color: white;
            font-size: 14px;
            outline: none;
            transition: all 0.3s ease;
        }

        .input-wrapper input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .input-wrapper input:focus {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.5);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
        }

        .input-icon {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            pointer-events: none;
            transition: color 0.3s ease;
        }

        .input-wrapper input:focus + .input-icon {
            color: white;
        }

        /* Form Options */
        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
            animation: slideUp 0.6s ease-out;
            animation-delay: 0.5s;
            animation-fill-mode: both;
        }

        .checkbox-wrapper {
            display: flex;
            align-items: center;
            color: rgba(255, 255, 255, 0.9);
            font-size: 13px;
            cursor: pointer;
        }

        .checkbox-wrapper input[type="checkbox"] {
            display: none;
        }

        .checkmark {
            width: 16px;
            height: 16px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 3px;
            margin-right: 8px;
            position: relative;
            transition: all 0.3s ease;
            flex-shrink: 0;
        }

        .checkmark:after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-size: 11px;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .checkbox-wrapper input[type="checkbox"]:checked + .checkmark {
            background: rgba(255, 255, 255, 0.3);
            border-color: rgba(255, 255, 255, 0.5);
        }

        .checkbox-wrapper input[type="checkbox"]:checked + .checkmark:after {
            opacity: 1;
        }

        .forgot-link {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            font-size: 13px;
            transition: color 0.3s ease;
        }

        .forgot-link:hover {
            color: white;
        }

        /* Submit Button */
        .submit-btn {
            width: 100%;
            padding: 15px;
            background: rgba(0, 0, 0, 0.4);
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            animation: slideUp 0.6s ease-out;
            animation-delay: 0.6s;
            animation-fill-mode: both;
            position: relative;
            overflow: hidden;
        }

        .submit-btn:hover:not(.loading) {
            background: rgba(0, 0, 0, 0.6);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .submit-btn:active:not(.loading) {
            transform: translateY(0);
        }

        /* Loading state */
        .submit-btn.loading {
            pointer-events: none;
            color: transparent;
            cursor: not-allowed;
        }

        .submit-btn.loading:after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 20px;
            height: 20px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top: 2px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        /* Switch Text */
        .switch-text {
            text-align: center;
            margin-top: 20px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            animation: slideUp 0.6s ease-out;
            animation-delay: 0.7s;
            animation-fill-mode: both;
        }

        .switch-text a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .switch-text a:hover {
            color: #64b5f6;
        }

        /* Animations */
        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes spin {
            0% { transform: translate(-50%, -50%) rotate(0deg); }
            100% { transform: translate(-50%, -50%) rotate(360deg); }
        }

        /* Success/Error Messages */
        .message {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 20px;
            border-radius: 8px;
            color: white;
            font-weight: 500;
            z-index: 1000;
            transform: translateX(400px);
            transition: transform 0.4s ease;
            display: flex;
            align-items: center;
            gap: 10px;
            max-width: 300px;
            backdrop-filter: blur(10px);
        }

        .message.show {
            transform: translateX(0);
        }

        .message.success {
            background: rgba(76, 175, 80, 0.9);
            border: 1px solid rgba(76, 175, 80, 0.3);
        }

        .message.error {
            background: rgba(244, 67, 54, 0.9);
            border: 1px solid rgba(244, 67, 54, 0.3);
        }

        .message .close-msg {
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            font-size: 14px;
            margin-left: auto;
            opacity: 0.8;
            transition: opacity 0.3s ease;
        }

        .message .close-msg:hover {
            opacity: 1;
        }

        /* Error state for inputs */
        .input-wrapper.error input {
            border-color: rgba(244, 67, 54, 0.7) !important;
            background: rgba(244, 67, 54, 0.1) !important;
        }

        .input-wrapper.success input {
            border-color: rgba(76, 175, 80, 0.7) !important;
        }

        /* Responsive */
        @media (max-width: 480px) {
            .auth-modal {
                width: 95%;
                padding: 25px 20px;
            }
            
            .modal-content h2 {
                font-size: 24px;
                margin-bottom: 25px;
            }
            
            .form-options {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            
            .trigger-buttons {
                flex-direction: column;
            }
            
            .message {
                right: 10px;
                left: 10px;
                max-width: none;
                transform: translateY(-100px);
            }
            
            .message.show {
                transform: translateY(0);
            }
        }

        /* Particle animation */
        @keyframes particleBurst {
            0% {
                transform: scale(0) translate(0, 0);
                opacity: 1;
            }
            100% {
                transform: scale(1) translate(var(--random-x), var(--random-y));
                opacity: 0;
            }
        }