/* Vibrant color palette */
        :root {
            --primary: #8B0000;
            --cyan: #6EC1E4;
            --orange: #FF9567;
            --green: #61CE70;

            --bg-dark: #0a0e27;
            --bg-card: #ffffff;
            --surface: rgba(255, 255, 255, 0.98);

            --text-dark: #1a1d2e;
            --text-light: #6b7280;
            --text-lighter: #9ca3af;
        }

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

        body {
            min-height: 100vh;
            font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow-x: hidden;
        }

        .signup-container {
            display: flex;
            min-height: 100vh;
        }

        /* Left Brand Section */
        .brand-section {
            flex: 1;
            background: linear-gradient(135deg, var(--green) 0%, #4ba85a 50%, var(--bg-dark) 100%);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 3rem;
            overflow: hidden;
        }

        .brand-section::before {
            content: '';
            position: absolute;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, var(--orange) 0%, transparent 70%);
            opacity: 0.15;
            top: -100px;
            left: -100px;
            border-radius: 50%;
        }

        .brand-section::after {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--cyan) 0%, transparent 70%);
            opacity: 0.12;
            bottom: -80px;
            right: -80px;
            border-radius: 50%;
        }

        .brand-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: white;
        }

        .brand-logo {
            font-size: 4rem;
            margin-bottom: 1.5rem;
            animation: float 3s ease-in-out infinite;
        }

        .brand-logo i {
            background: linear-gradient(135deg, var(--cyan), var(--orange), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            filter: drop-shadow(0 4px 12px rgba(110, 193, 228, 0.3));
        }

        @keyframes float {

            0%,
            100% {
                transform: translateY(0px);
            }

            50% {
                transform: translateY(-20px);
            }
        }

        .brand-content h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .brand-content p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 400px;
            margin: 0 auto;
        }

        .feature-icons {
            display: flex;
            gap: 2rem;
            margin-top: 3rem;
            justify-content: center;
        }

        .feature-icon {
            text-align: center;
        }

        .feature-icon i {
            font-size: 2rem;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.5rem;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
        }

        .feature-icon:nth-child(1) i {
            color: var(--cyan);
        }

        .feature-icon:nth-child(2) i {
            color: var(--orange);
        }

        .feature-icon:nth-child(3) i {
            color: var(--primary);
        }

        /* Right Form Section */
        .form-section {
            flex: 1;
            background: #f8f9fa;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 3rem 3rem;
            overflow-y: auto;
        }

        .signup-card {
            width: 100%;
            max-width: 780px;
            background: var(--surface);
            border-radius: 28px;
            padding: 3.5rem 3.5rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
            margin: 2rem 0;
        }

        .signup-logo {
            text-align: center;
            margin-bottom: 1.5rem;
        }

        .signup-logo-img {
            max-height: 60px;
            width: auto;
            object-fit: contain;
        }

        .signup-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .signup-header h2 {
            color: var(--text-dark);
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .signup-header p {
            color: var(--text-light);
            font-size: 1.05rem;
        }

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

        .input-group-icon {
            position: relative;
            margin-bottom: 1.25rem;
        }

        .input-group-icon label {
            display: block;
            color: var(--text-dark);
            font-weight: 500;
            margin-bottom: 0.5rem;
            font-size: 1rem;
        }

        .input-wrapper {
            position: relative;
        }

        .input-wrapper i {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-lighter);
            z-index: 2;
        }

        .input-group-icon input {
            width: 100%;
            padding: 1rem 1.1rem 1rem 3rem;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 1.05rem;
            transition: all 0.3s ease;
            background: white;
            color: var(--text-dark);
        }

        .input-group-icon input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(139, 0, 0, 0.08);
        }

        .input-group-icon input.is-invalid {
            border-color: #dc3545;
        }

        .input-group-icon input.is-valid {
            border-color: var(--green);
        }

        .password-toggle {
            position: absolute;
            right: 1rem;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-lighter);
            cursor: pointer;
            padding: 0.25rem;
            z-index: 2;
        }

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

        .password-strength {
            margin-top: 0.5rem;
            height: 4px;
            background: #e5e7eb;
            border-radius: 2px;
            overflow: hidden;
        }

        .password-strength-bar {
            height: 100%;
            width: 0%;
            transition: all 0.3s ease;
            border-radius: 2px;
        }

        .strength-weak {
            width: 33%;
            background: #dc3545;
        }

        .strength-medium {
            width: 66%;
            background: var(--orange);
        }

        .strength-strong {
            width: 100%;
            background: var(--green);
        }

        .password-hint {
            font-size: 0.8rem;
            color: var(--text-lighter);
            margin-top: 0.25rem;
        }

        .error-message {
            font-size: 0.8rem;
            color: #dc3545;
            margin-top: 0.25rem;
            display: none;
        }

        .terms-check {
            margin-bottom: 1.5rem;
            font-size: 0.875rem;
        }

        .terms-check label {
            color: var(--text-light);
        }

        .terms-check a {
            color: var(--primary);
            text-decoration: none;
        }

        .terms-check a:hover {
            color: var(--orange);
        }

        .btn-signup {
            width: 100%;
            padding: 1.1rem;
            background: linear-gradient(135deg, var(--green) 0%, #4ba85a 100%);
            border: none;
            border-radius: 12px;
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-signup::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .btn-signup:hover::before {
            left: 100%;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(97, 206, 112, 0.3);
        }

        .btn-signup:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .divider {
            text-align: center;
            margin: 1.5rem 0;
            position: relative;
        }

        .divider::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            width: 100%;
            height: 1px;
            background: #e5e7eb;
        }

        .divider span {
            background: var(--surface);
            padding: 0 1rem;
            position: relative;
            color: var(--text-lighter);
            font-size: 0.875rem;
        }

        .social-signup {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .social-btn {
            padding: 0.75rem;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            background: white;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .social-btn i {
            font-size: 1.25rem;
        }

        .social-btn:nth-child(1) {
            color: var(--cyan);
        }

        .social-btn:nth-child(2) {
            color: var(--text-dark);
        }

        .social-btn:nth-child(3) {
            color: #1877f2;
        }

        .social-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .social-btn:nth-child(1):hover {
            border-color: var(--cyan);
            background: rgba(110, 193, 228, 0.05);
        }

        .social-btn:nth-child(2):hover {
            border-color: var(--text-dark);
            background: rgba(0, 0, 0, 0.05);
        }

        .social-btn:nth-child(3):hover {
            border-color: #1877f2;
            background: rgba(24, 119, 242, 0.05);
        }

        .signin-link {
            text-align: center;
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .signin-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
        }

        .signin-link a:hover {
            color: var(--orange);
        }

        /* Phone row: country code + number */
        .phone-input-row {
            display: flex;
            gap: 0.5rem;
            align-items: stretch;
        }

        .country-code-select {
            flex: 0 0 auto;
            width: 130px;
            padding: 1rem 0.75rem;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 1rem;
            background: white;
            color: var(--text-dark);
            cursor: pointer;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 0.65rem center;
            padding-right: 1.75rem;
        }

        .country-code-select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(139, 0, 0, 0.08);
        }

        .phone-number-wrapper {
            flex: 1;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .brand-section {
                display: none;
            }

            .form-section {
                flex: 1;
            }
        }

        @media (max-width: 576px) {
            .signup-card {
                padding: 2rem 1.5rem;
            }

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

            .social-signup {
                grid-template-columns: 1fr;
            }
        }