:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --accent: #10b981;
    --accent-dark: #059669;
}

* { box-sizing: border-box; }

body {
    min-height: 100vh;
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    display: flex;
}

.signup-left {
    flex: 0 0 380px;
    background: var(--primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 60px 32px;
    color: white;
    position: relative;
}

.signup-left .brand {
    text-align: center;
}

.signup-left .brand-icon {
    font-size: 56px;
    margin-bottom: 16px;
    display: block;
}

.signup-left .brand h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.signup-left .brand p {
    font-size: 16px;
    opacity: 0.9;
    max-width: 300px;
    line-height: 1.6;
}

.signup-left .features-list {
    margin-top: 36px;
    list-style: none;
    padding: 0;
}

.signup-left .features-list li {
    padding: 6px 0;
    font-size: 15px;
    opacity: 0.9;
}

.signup-left .features-list li i {
    color: var(--accent);
    margin-right: 10px;
}

.signup-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background: #f8fafc;
    overflow-y: auto;
}

.signup-form-wrapper {
    width: 100%;
    max-width: 520px;
}

.signup-form-wrapper h2 {
    font-size: 28px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
}

.signup-form-wrapper .subtitle {
    color: #64748b;
    margin-bottom: 28px;
    font-size: 15px;
}

.form-label {
    font-weight: 600;
    color: #374151;
    font-size: 14px;
}

.input-group-text {
    background: white;
    border-right: none;
    color: #6b7280;
}

.input-group .form-control {
    border-left: none;
}

.input-group .form-control:focus {
    box-shadow: none;
    border-color: #dee2e6;
}

.input-group:focus-within {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    border-radius: 0.375rem;
}

.input-group:focus-within .input-group-text,
.input-group:focus-within .form-control {
    border-color: var(--primary-light);
}

.btn-signup {
    background: var(--accent);
    border: none;
    padding: 12px;
    font-weight: 600;
    font-size: 16px;
    border-radius: 8px;
    transition: all 0.2s;
    color: white;
}

.btn-signup:hover {
    background: var(--accent-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.back-link {
    position: absolute;
    top: 24px;
    left: 24px;
    color: white;
    text-decoration: none;
    font-size: 14px;
    opacity: 0.8;
    z-index: 2;
}

.back-link:hover { opacity: 1; color: white; }

.section-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 16px;
    color: #94a3b8;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e2e8f0;
}

@media (max-width: 991px) {
    body { flex-direction: column; }

    .signup-left {
        flex: none;
        padding: 40px 24px;
        min-height: auto;
    }

    .signup-left .brand-icon { font-size: 42px; }
    .signup-left .brand h1 { font-size: 28px; }
    .signup-left .features-list { display: none; }

    .signup-right { padding: 32px 24px; }

    .back-link { position: static; display: inline-block; margin-bottom: 16px; color: var(--primary); }
}

@media (max-width: 576px) {
    .signup-left { padding: 30px 20px; }
    .signup-left .brand h1 { font-size: 24px; }
    .signup-right { padding: 24px 20px; }
    .signup-form-wrapper h2 { font-size: 22px; }
}