@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #6366f1;
            --secondary: #8b5cf6;
            --accent: #ec4899;
            --dark: #0f0f23;
            --darker: #070718;
            --light: #f8fafc;
            --text-primary: #ffffff;
            --text-secondary: #94a3b8;
            --neon-blue: #00d4ff;
            --neon-pink: #ff0080;
            --neon-purple: #8000ff;
            --success: #10b981;
            --error: #ef4444;
        }

        body {
            font-family: 'Space Grotesk', sans-serif;
            background: var(--dark);
            color: var(--text-primary);
            overflow-x: hidden;
            min-height: 100vh;
            cursor: none;
        }

        /* Custom Cursor */
        .cursor {
            position: fixed;
            width: 20px;
            height: 20px;
            background: radial-gradient(circle, var(--neon-blue), transparent);
            border-radius: 50%;
            pointer-events: none;
            z-index: 1;
            mix-blend-mode: difference;
            transition: transform 0.15s ease;
        }
/* 
        .cursor-trail {
            position: fixed;
            width: 4px;
            height: 4px;
            background: var(--neon-pink);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0 !important;
        } */

        /* Animated Background */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
        }

        .bg-animation::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
            animation: bgPulse 12s ease-in-out infinite alternate;
        }

        @keyframes bgPulse {
            0% { opacity: 0.4; transform: scale(1) rotate(0deg); }
            100% { opacity: 0.8; transform: scale(1.1) rotate(5deg); }
        }

        /* Floating Elements */
        .floating-elements {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
        }

        .floating-element {
            position: absolute;
            width: 2px;
            height: 2px;
            background: var(--neon-blue);
            border-radius: 50%;
            animation: float 20s linear infinite;
        }

        @keyframes float {
            from {
                transform: translateY(100vh) rotate(0deg);
                opacity: 0;
            }
            10% { opacity: 1; }
            90% { opacity: 1; }
            to {
                transform: translateY(-100vh) rotate(360deg);
                opacity: 0;
            }
        }

        /* Header */
        .header {
            position: fixed;
            top: 0;
            width: 100%;
            padding: 2rem 4%;
            backdrop-filter: blur(20px);
            background: rgba(15, 15, 35, 0.9);
            border-bottom: 1px solid rgba(99, 102, 241, 0.2);
            z-index: 1000;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }

        .logo {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -2px;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink), var(--neon-purple));
            background-size: 300% 300%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: gradientFlow 6s ease-in-out infinite;
            text-decoration: none;
        }

        @keyframes gradientFlow {
            0%, 100% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
        }

        .back-home {
            color: var(--text-secondary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s ease;
            font-weight: 500;
        }

        .back-home:hover {
            color: var(--text-primary);
            text-shadow: 0 0 20px var(--neon-blue);
        }

        /* Main Container */
        .auth-container {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 0 2rem;
            padding-top: 100px;
        }

        .auth-wrapper {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(30px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 32px;
            overflow: hidden;
            box-shadow: 0 40px 80px rgba(0, 0, 0, 0.3);
            min-height: 700px;
        }

        /* Left Side - Visual */
        .auth-visual {
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            background-size: 300% 300%;
            animation: gradientFlow 10s ease-in-out infinite;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 3rem;
            overflow: hidden;
        }

        .auth-visual::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.2);
            z-index: 1;
        }

        .visual-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .visual-icon {
            width: 120px;
            height: 120px;
            margin: 0 auto 2rem;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            animation: pulse 3s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4); }
            50% { transform: scale(1.1); box-shadow: 0 0 0 20px rgba(255, 255, 255, 0); }
        }

        .visual-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: white;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .visual-subtitle {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.6;
        }

        .floating-books-auth {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
        }

        .book-float {
            position: absolute;
            width: 60px;
            height: 90px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 6px;
            animation: bookFloat 8s ease-in-out infinite;
        }

        .book-float:nth-child(1) {
            top: 10%;
            left: 10%;
            animation-delay: 0s;
        }

        .book-float:nth-child(2) {
            top: 70%;
            left: 80%;
            animation-delay: -2s;
        }

        .book-float:nth-child(3) {
            top: 30%;
            right: 15%;
            animation-delay: -4s;
        }

        @keyframes bookFloat {
            0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.3; }
            50% { transform: translateY(-30px) rotate(10deg); opacity: 0.6; }
        }

        /* Right Side - Forms */
        .auth-forms {
            padding: 3rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
        }

        .form-toggle {
            display: flex;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50px;
            padding: 4px;
            margin-bottom: 3rem;
            position: relative;
        }

        .toggle-btn {
            flex: 1;
            padding: 12px 24px;
            border: none;
            background: transparent;
            color: var(--text-secondary);
            font-weight: 600;
            border-radius: 46px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            z-index: 2;
        }

        .toggle-btn.active {
            color: var(--text-primary);
        }

        .toggle-indicator {
            position: absolute;
            top: 4px;
            left: 4px;
            width: calc(50% - 4px);
            height: calc(100% - 8px);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 46px;
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
        }

        .toggle-indicator.login {
            transform: translateX(100%);
        }

        /* Forms */
        .form {
            opacity: 0;
            transform: translateX(30px);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            position: absolute;
            width: calc(100% - 6rem);
            pointer-events: none;
            z-index: 1;
        }

        .form.active {
            opacity: 1;
            transform: translateX(0);
            position: relative;
            pointer-events: auto;
            z-index: 2;
        }

        .form-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .form-subtitle {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 1.1rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
            position: relative;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            color: var(--text-secondary);
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .form-input {
            width: 100%;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.05);
            border: 2px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            color: var(--text-primary);
            font-size: 1rem;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(10px);
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
        }

        .form-input:focus + .form-label,
        .form-input:not(:placeholder-shown) + .form-label {
            color: var(--primary);
            transform: translateY(-2px);
        }

        .password-toggle {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 1.2rem;
            transition: color 0.3s ease;
        }

        .password-toggle:hover {
            color: var(--text-primary);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 12px;
            margin: 1.5rem 0;
        }

        .checkbox {
            appearance: none;
            width: 20px;
            height: 20px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 4px;
            position: relative;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .checkbox:checked {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-color: var(--primary);
        }

        .checkbox:checked::after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-weight: bold;
            font-size: 12px;
        }

        .checkbox-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .checkbox-label a {
            color: var(--primary);
            text-decoration: none;
        }

        .submit-btn {
            width: 100%;
            padding: 18px;
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            background-size: 300% 300%;
            border: none;
            border-radius: 12px;
            color: white;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            animation: gradientFlow 6s ease-in-out infinite;
            margin: 1rem 0;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 20px 40px rgba(99, 102, 241, 0.4);
        }

        .submit-btn:active {
            transform: translateY(0);
        }

        .divider {
            text-align: center;
            margin: 2rem 0;
            position: relative;
            color: var(--text-secondary);
        }

        .divider::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.1);
            z-index: 1;
        }

        .divider span {
            background: var(--dark);
            padding: 0 1rem;
            position: relative;
            z-index: 2;
        }

        .social-buttons {
            display: flex;
            gap: 1rem;
        }

        .social-btn {
            flex: 1;
            padding: 14px;
            background: rgba(255, 255, 255, 0.05);
            border: 2px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            color: var(--text-primary);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .social-btn:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
        }

        .forgot-password {
            text-align: center;
            margin-top: 1rem;
        }

        .forgot-password a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .forgot-password a:hover {
            text-shadow: 0 0 20px var(--primary);
        }

        /* Success/Error States */
        .form-message {
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 1rem;
            font-weight: 500;
            display: none;
        }

        .form-message.success {
            background: rgba(16, 185, 129, 0.1);
            border: 1px solid var(--success);
            color: var(--success);
        }

        .form-message.error {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid var(--error);
            color: var(--error);
        }

        .form-input.error {
            border-color: var(--error);
        }

        .form-input.success {
            border-color: var(--success);
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .auth-wrapper {
                grid-template-columns: 1fr;
                margin: 1rem;
            }

            .auth-visual {
                order: 2;
                min-height: 200px;
                padding: 2rem;
            }

            .auth-forms {
                order: 1;
                padding: 2rem;
            }

            .form-row {
                grid-template-columns: 1fr;
            }

            .social-buttons {
                flex-direction: column;
            }

            .form-title {
                font-size: 2rem;
            }

            .visual-title {
                font-size: 1.8rem;
            }
        }