/* ?? Design Tokens (matching landing page) ?? */
        :root {
            --indigo-600: #4F46E5;
            --indigo-700: #4338CA;
            --indigo-800: #3730A3;
            --indigo-900: #312E81;
            --indigo-950: #1E1B4B;
            --indigo-100: #E0E7FF;
            --indigo-50: #EEF2FF;
            --cyan-500: #06B6D4;
            --bg: #F1F5F9;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-2: #334155;
            --text-3: #475569;
            --border: #E2E8F0;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
            --shadow-lg: 0 16px 48px rgba(79, 70, 229, 0.12), 0 4px 16px rgba(15, 23, 42, 0.06);
            --font-display: 'Plus Jakarta Sans', sans-serif;
            --font-body: 'Inter', sans-serif;
            --radius: 1rem;
            --radius-sm: 0.5rem;
            --radius-lg: 1.5rem;
            --space-xs: 0.25rem;
            --space-sm: 0.5rem;
            --space-md: 0.75rem;
            --space-base: 1rem;
            --space-lg: 1.5rem;
            --space-xl: 2rem;
            --space-2xl: 3rem;
        }

        /* ?? Reduced Motion ?? */
        @media (prefers-reduced-motion: reduce) {
          *,
          *::before,
          *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
          }
        }

        /* ?? Reset ?? */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-display);
        }

        /* ?? Split Layout ?? */
        .register-page {
            display: grid;
            grid-template-columns: 1fr 1fr;
            min-height: 100vh;
        }

        /* ?? Left Panel ? Value Proposition ?? */
        .register-left {
            background: linear-gradient(135deg, var(--indigo-950) 0%, var(--indigo-800) 50%, var(--indigo-600) 100%);
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: var(--space-2xl) var(--space-xl);
            overflow: hidden;
        }

        /* Animated gradient overlay */
        .register-left::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(-45deg, rgba(79,70,229,0.3), rgba(30,27,75,0.5), rgba(67,56,202,0.3), rgba(6,182,212,0.15));
            background-size: 400% 400%;
            animation: gradientShift 15s ease infinite;
        }

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

        /* Geometric accents */
        .register-left::after {
            content: '';
            position: absolute;
            top: -15%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(6,182,212,0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .left-content {
            position: relative;
            z-index: 2;
        }

        /* Logo */
        .brand-logo {
            margin-bottom: 3rem;
        }

        .brand-logo img {
            height: 44px;
            width: auto;
            filter: brightness(0) invert(1);
            opacity: 0.95;
        }

        /* Headline */
        .left-headline {
            font-size: clamp(1.75rem, 2.5vw, 2.5rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 1.25rem;
        }

        .left-headline .text-gradient {
            background: linear-gradient(135deg, #818CF8, var(--cyan-500));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .left-subtitle {
            font-size: 1.0625rem;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
            margin-bottom: 2.5rem;
            max-width: 420px;
        }

        /* Feature Pills */
        .feature-pills {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-bottom: 3rem;
        }

        .feature-pill {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.875rem 1.25rem;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius);
            backdrop-filter: blur(8px);
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.feature-pill:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
  transform: translateX(4px);
        }

        .pill-icon {
            width: 2.5rem;
            height: 2.5rem;
            background: linear-gradient(135deg, var(--indigo-600), var(--cyan-500));
            border-radius: 0.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.9rem;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(79,70,229,0.3);
        }

        .pill-text h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.125rem;
        }

        .pill-text p {
            font-size: 0.8rem;
            color: rgba(255,255,255,0.6);
            line-height: 1.4;
        }

        /* Trust Row */
        .trust-row {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: rgba(255,255,255,0.7);
        }

        .trust-item svg {
            width: 16px;
            height: 16px;
            color: var(--cyan-500);
        }

        /* Floating Particles */
        .particles {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 1;
        }

        #hero-3d-container {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 1;
            opacity: 0.6;
            overflow: hidden;
        }

        .particle {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(255,255,255,0.15);
            border-radius: 50%;
            animation: float var(--duration) ease-in-out infinite;
            animation-delay: var(--delay);
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) translateX(0); opacity: 0.15; }
            50% { transform: translateY(var(--ty)) translateX(var(--tx)); opacity: 0.4; }
        }

        /* ?? Right Panel ? Form ?? */
        .register-right {
            display: flex;
            flex-direction: column;
            justify-content: flex-start;
            align-items: center;
            padding: var(--space-2xl) var(--space-xl);
            background: linear-gradient(180deg, #F8FAFC 0%, var(--bg) 100%);
            position: relative;
            overflow-y: auto;
        }

        /* Subtle dot pattern */
        .register-right::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='20' height='20' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='10' cy='10' r='0.8' fill='rgba(79,70,229,0.04)'/%3E%3C/svg%3E");
            pointer-events: none;
        }

        .form-container {
            width: 100%;
            max-width: 480px;
            position: relative;
            z-index: 2;
        }

        /* Form Header */
        .form-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .form-header .mobile-logo {
            display: none;
            margin-bottom: 1.5rem;
        }

        .form-header .mobile-logo img {
            height: 36px;
            width: auto;
        }

        .form-header h1 {
            font-size: 1.875rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.03em;
            margin-bottom: 0.5rem;
        }

        .form-header p {
            font-size: 0.9375rem;
            color: var(--text-3);
        }

        /* Form Card */
        .form-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-lg);
            animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        }

        @keyframes slideUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Form Inputs */
        .form-group {
            margin-bottom: 1.25rem;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.75rem;
        }

        .form-label {
            display: block;
            font-family: var(--font-display);
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--text-2);
            margin-bottom: 0.5rem;
        }

        .form-label .optional {
            font-weight: 500;
            color: var(--text-3);
            font-size: 0.75rem;
        }

        .input-wrap {
            position: relative;
        }

        .input-wrap .input-icon {
            position: absolute;
            top: 50%;
            left: 0.875rem;
            transform: translateY(-50%);
            color: #94A3B8;
            font-size: 0.875rem;
            transition: color 0.2s;
            pointer-events: none;
        }

        .form-input {
            display: block;
            width: 100%;
            padding: 0.75rem 0.875rem;
            font-family: var(--font-body);
            font-size: 0.9rem;
            color: var(--text);
            background: var(--surface);
            border: 1.5px solid var(--border);
            border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input.has-icon {
            padding-left: 2.5rem;
        }

        .form-input::placeholder {
            color: #94A3B8;
        }

        .form-input:focus {
            border-color: var(--indigo-600);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
        }

        .form-input:focus + .input-icon,
        .input-wrap:focus-within .input-icon {
            color: var(--indigo-600);
        }

        /* Password Toggle */
        .password-toggle {
            position: absolute;
            top: 50%;
            right: 0.875rem;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #94A3B8;
            cursor: pointer;
            padding: 0.25rem;
            transition: color 0.2s;
        }

        .password-toggle:hover {
            color: var(--indigo-600);
        }

        /* Password Strength */
        .strength-bar-wrap {
            margin-top: 0.5rem;
        }

        .strength-bar-track {
            height: 4px;
            background: var(--border);
            border-radius: 2px;
            overflow: hidden;
        }

        .strength-bar-fill {
            height: 100%;
            width: 0%;
            border-radius: 2px;
            transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .strength-text {
            font-size: 0.75rem;
            color: var(--text-3);
            margin-top: 0.375rem;
        }

        /* Terms Checkbox */
        .terms-group {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
            margin-top: 0.25rem;
        }

        .terms-group input[type="checkbox"] {
            width: 18px;
            height: 18px;
            accent-color: var(--indigo-600);
            margin-top: 2px;
            cursor: pointer;
            flex-shrink: 0;
        }

        .terms-group label {
            font-size: 0.8125rem;
            color: var(--text-3);
            line-height: 1.5;
            cursor: pointer;
        }

        .terms-group a {
            color: var(--indigo-600);
            font-weight: 600;
            text-decoration: none;
            transition: color 0.2s;
        }

        .terms-group a:hover {
            color: var(--indigo-700);
            text-decoration: underline;
        }

        /* Submit Button */
        .btn-register {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            width: 100%;
            padding: 0.875rem 1.5rem;
            font-family: var(--font-display);
            font-size: 0.9375rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--indigo-600), var(--indigo-700));
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-register::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, transparent, rgba(255,255,255,0.1), transparent);
            transform: translateX(-100%);
            transition: transform 0.6s ease;
        }

        .btn-register:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.45);
        }

        .btn-register:hover::before {
            transform: translateX(100%);
        }

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

        /* Login Link */
        .login-link {
            text-align: center;
            margin-top: 1.5rem;
            font-size: 0.875rem;
            color: var(--text-3);
        }

        .login-link a {
            color: var(--indigo-600);
            font-weight: 700;
            text-decoration: none;
            transition: color 0.2s;
        }

        .login-link a:hover {
            color: var(--indigo-700);
            text-decoration: underline;
        }

        /* Social Proof below form */
        .form-social-proof {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.625rem;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
        }

        .avatar-stack {
            display: flex;
        }

        .avatar-stack .avatar {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--surface);
            background: var(--indigo-50);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--indigo-600);
            margin-left: -8px;
        }

        .avatar-stack .avatar:first-child {
            margin-left: 0;
        }

        .avatar-stack .avatar img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            object-fit: cover;
        }

        .social-proof-text {
            font-size: 0.8rem;
            color: var(--text-3);
        }

        .social-proof-text strong {
            color: var(--text-2);
        }

        /* ?? Alert Messages ?? */
        .alert {
            padding: 1rem 1.25rem;
            border-radius: var(--radius-sm);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            animation: slideUp 0.4s ease forwards;
        }

        .alert-icon {
            flex-shrink: 0;
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
        }

        .alert-error {
            background: #FEF2F2;
            border: 1px solid #FECACA;
        }

        .alert-error .alert-icon {
            background: #FEE2E2;
            color: #DC2626;
        }

        .alert-error .alert-title { color: #991B1B; font-weight: 700; font-size: 0.8125rem; }
        .alert-error .alert-msg { color: #B91C1C; font-size: 0.8125rem; }

        .alert-close {
            margin-left: auto;
            background: none;
            border: none;
            color: #94A3B8;
            cursor: pointer;
            padding: 0.25rem;
            transition: color 0.2s;
        }

        .alert-close:hover { color: var(--text); }

        /* ?? Success State ?? */
        .success-card {
            text-align: center;
            padding: 2.5rem 2rem;
        }

        .success-icon-wrap {
            width: 4.5rem;
            height: 4.5rem;
            background: linear-gradient(135deg, #10B981, #06D6A0);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
            animation: successPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
        }

        @keyframes successPop {
            0% { transform: scale(0); opacity: 0; }
            100% { transform: scale(1); opacity: 1; }
        }

        .success-icon-wrap i {
            color: #fff;
            font-size: 1.75rem;
        }

        .success-title {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .success-msg {
            font-size: 0.9375rem;
            color: var(--text-3);
            margin-bottom: 2rem;
            line-height: 1.6;
        }

        .email-notice {
            background: #F0FDF4;
            border: 1px solid #BBF7D0;
            border-radius: var(--radius);
            padding: 1.25rem;
            margin-bottom: 2rem;
            display: flex;
            align-items: flex-start;
            gap: 0.875rem;
            text-align: left;
        }

        .email-notice-icon {
            width: 2.5rem;
            height: 2.5rem;
            background: #DCFCE7;
            border-radius: 0.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #16A34A;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .email-notice h4 {
            font-size: 0.875rem;
            font-weight: 700;
            color: #166534;
            margin-bottom: 0.25rem;
        }

        .email-notice p {
            font-size: 0.8125rem;
            color: #15803D;
            line-height: 1.5;
        }

        .email-notice .hint {
            font-size: 0.75rem;
            color: #22C55E;
            margin-top: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.375rem;
        }

        .btn-login-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.875rem 2rem;
            font-family: var(--font-display);
            font-size: 0.9375rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #10B981, #059669);
            border: none;
            border-radius: var(--radius-sm);
            text-decoration: none;
            cursor: pointer;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .btn-login-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.45);
        }

        /* ?? Mobile Responsive ?? */
        @media (max-width: 1024px) {
            .register-page {
                grid-template-columns: 1fr;
            }

            .register-left {
                display: none;
            }

            .register-right {
                padding: 2rem 1.25rem;
                min-height: 100vh;
                background: linear-gradient(135deg, var(--indigo-950) 0%, var(--indigo-800) 50%, var(--indigo-600) 100%);
            }

            .register-right::before {
                background: url("data:image/svg+xml,%3Csvg width='20' height='20' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='10' cy='10' r='0.8' fill='rgba(255,255,255,0.04)'/%3E%3C/svg%3E");
            }

            .form-header .mobile-logo {
                display: block;
            }

            .form-header h1 {
                color: #fff;
                font-size: 1.5rem;
            }

            .form-header p {
                color: rgba(255,255,255,0.7);
            }

            .form-card {
                background: rgba(255,255,255,0.95);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-color: rgba(255,255,255,0.2);
            }

            .form-container {
                max-width: 440px;
            }

            .login-link {
                color: rgba(255,255,255,0.7);
            }

            .login-link a {
                color: #fff;
            }

            .form-social-proof {
                border-top-color: rgba(255,255,255,0.15);
            }

            .social-proof-text {
                color: rgba(255,255,255,0.6);
            }

            .social-proof-text strong {
                color: rgba(255,255,255,0.9);
            }
        }

        @media (max-width: 480px) {
            .form-row {
                grid-template-columns: 1fr;
            }

            .form-card {
                padding: 1.5rem;
            }

            .trust-row {
                flex-direction: column;
                gap: 0.75rem;
            }
        }