:root {
            --primary: #6c5ce7;
            --secondary: #00cec9;
            --dark: #0f0f1a;
            --darker: #080811;
            --light: #f8f9fa;
            --success: #00b894;
            --danger: #d63031;
            --warning: #fdcb6e;
            --text-primary: #0f0f1a;
            --text-secondary: rgba(15, 15, 26, 0.7);
            --nav-active: #00cec9;
            --bg: #ffffff;
            --card-bg: #f8f9fa;
            --border: rgba(15, 15, 26, 0.1);
        }

        .dark-mode {
            --text-primary: #ffffff;
            --text-secondary: rgba(255, 255, 255, 0.7);
            --bg: #0f0f1a;
            --card-bg: rgba(255, 255, 255, 0.04);
            --border: rgba(255, 255, 255, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
        }
        
        body {
            background-color: var(--bg);
            color: var(--text-primary);
            max-width: 450px;
            margin: 0 auto;
            height: 100vh;
            overflow-x: hidden;
            position: relative;
            background-image: 
                radial-gradient(circle at 20% 30%, rgba(108, 92, 231, 0.15) 0%, transparent 30%),
                radial-gradient(circle at 80% 70%, rgba(0, 206, 201, 0.15) 0%, transparent 30%);
            animation: gradientShift 15s ease infinite;            
        }
        
        /* Background Particles */
        .background-particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, rgba(15, 52, 96, 0) 70%);
        }
        
        .particle {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(0, 206, 201, 0.6);
            border-radius: 50%;
            animation: floatParticle 8s infinite ease-in-out;
            box-shadow: 0 0 8px rgba(0, 206, 201, 0.3);
        }
        
        @keyframes floatParticle {
            0% { transform: translateY(100vh) scale(0.5); opacity: 0; }
            50% { opacity: 0.7; }
            100% { transform: translateY(-20vh) scale(1); opacity: 0; }
        }
        
        .app-container {
            display: flex;
            flex-direction: column;
            height: 100%;
            position: relative;
            z-index: 1;
        }
        
        /* Header Styles */
        .header {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 18px 20px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            animation: fadeInDown 0.5s ease-out;
        }
        
        .dark-mode .header {
            background: rgba(15, 15, 26, 0.9);
            border-bottom: 1px solid var(--border);
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            height: 32px;
            margin-right: 12px;
            transition: transform 0.3s ease;
        }
        
        .logo h1 {
            font-size: 20px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        
        /* Main Content Styles */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 30px 20px;
            animation: fadeIn 0.8s ease-out;
        }
        
        /* Signup Form */
        .signup-container {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 30px;
            border: 1px solid var(--border);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            backdrop-filter: blur(10px);
            margin-bottom: 20px;
        }
        
        .signup-title {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .signup-title h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        
        .signup-title p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        
        .input-group {
            margin-bottom: 20px;
            position: relative;
        }
        
        .input-group label {
            display: block;
            font-size: 14px;
            margin-bottom: 8px;
            color: var(--text-primary);
            font-weight: 500;
        }
        
        .input-field {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid var(--border);
            border-radius: 12px;
            background: var(--bg);
            font-size: 15px;
            color: var(--text-primary);
            transition: all 0.3s ease;
        }
        
        .input-field:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
            outline: none;
        }
        
        .password-toggle {
            position: absolute;
            right: 15px;
            top: 40px;
            color: var(--text-secondary);
            cursor: pointer;
        }
        
        .terms-conditions {
            display: flex;
            align-items: flex-start;
            margin-bottom: 20px;
            font-size: 14px;
        }
        
        .terms-conditions input {
            margin-right: 10px;
            margin-top: 3px;
            accent-color: var(--primary);
        }
        
        .terms-conditions label {
            color: var(--text-secondary);
        }
        
        .terms-conditions a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        
        .signup-btn {
            width: 100%;
            padding: 14px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 20px;
        }
        
        .signup-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(108, 92, 231, 0.3);
        }
        
        .social-signup {
            text-align: center;
            margin-bottom: 20px;
        }
        
        .social-signup p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 15px;
            position: relative;
        }
        
        .social-signup p::before,
        .social-signup p::after {
            content: "";
            position: absolute;
            top: 50%;
            width: 30%;
            height: 1px;
            background: var(--border);
        }
        
        .social-signup p::before {
            left: 0;
        }
        
        .social-signup p::after {
            right: 0;
        }
        
        .social-icons {
            display: flex;
            justify-content: center;
            gap: 15px;
        }
        
        .social-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--card-bg);
            border: 1px solid var(--border);
            color: var(--text-primary);
            font-size: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .social-icon:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .login-link {
            text-align: center;
            font-size: 14px;
            color: var(--text-secondary);
        }
        
        .login-link a {
            color: var(--primary);
            font-weight: 500;
            text-decoration: none;
        }
        
        /* Password Strength Indicator */
        .password-strength {
            margin-top: 8px;
            height: 4px;
            background: var(--border);
            border-radius: 2px;
            overflow: hidden;
        }
        
        .strength-meter {
            height: 100%;
            width: 0%;
            background: var(--danger);
            transition: width 0.3s ease, background 0.3s ease;
        }
        
        /* Animations */
        @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
        @keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes gradientShift {
            0% { background-position: 20% 30%, 80% 70%; }
            50% { background-position: 30% 40%, 70% 60%; }
            100% { background-position: 20% 30%, 80% 70%; }
        }