/* --- Root Variables & General Styles --- */
:root {
    --primary-color: #20c997;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --text-color: #495057;
    --heading-color: #343a40;
    --border-color: #ced4da;
    --white: #ffffff;
    --dark-grey: #404344;
    --blue-gradient: linear-gradient(135deg, #4e73df, #1cc88a);
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.07);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- Main Layout & Header --- */
.main-container {
    max-width: 1400px;
    margin: 2rem auto;
    background: var(--white);
    box-shadow: var(--box-shadow);
    border-radius: 10px;
    overflow: hidden;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--dark-grey);
    border-bottom: 1px solid #e3e6f0;
}

.logo {
    height: 60px;
}

.facebook-link {
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    transition: color 0.3s;
}
.facebook-link:hover {
    color: var(--border-color);
}

.registration-container {
    display: flex;
    min-height: 80vh;
}

/* --- Form Column (Left) --- */
.form-column {
    flex: 1;
    padding: 2.5rem 3rem;
}

.form-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.form-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.form-column h2 {
    color: var(--heading-color);
    font-weight: 600;
}

.form-subheading {
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

/* Form Groups & Rows */
.form-group {
    margin-bottom: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}
.form-row .form-group {
    margin-bottom: 0;
}


.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--heading-color);
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(32, 201, 151, 0.25);
}

.form-group input[type="file"] {
    padding: 0.6rem 1rem;
    cursor: pointer;
}
.form-group input[type="file"]::file-selector-button {
    margin-right: 1rem;
    border: none;
    background: var(--primary-color);
    padding: 0.6rem 0.8rem;
    border-radius: 3px;
    color: var(--white);
    cursor: pointer;
    transition: background-color .2s ease-in-out;
}
.form-group input[type="file"]::file-selector-button:hover {
     background-color: #17a683;
}


/* Form Buttons & Links */
.form-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #e3e6f0;
    padding-top: 1.5rem;
    margin-top: 2rem;
}
.form-buttons .account-link {
    margin: 0;
}
.form-buttons .btn {
    margin-left: auto;
}
.form-buttons .btn-secondary {
    margin-left: 0;
    margin-right: 1rem;
}

.account-link {
    display: block;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
}
.account-link:hover {
    text-decoration: underline;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}
.btn-primary:hover {
    background-color: #17a683;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}
.btn-secondary:hover {
    background-color: #5a6268;
}

/* Checkbox Styling */
.form-group-checkbox {
    display: flex;
    align-items: center;
    margin-top: 1.5rem;
}
.form-group-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 0.75rem;
    cursor: pointer;
    accent-color: var(--primary-color);
}
.form-group-checkbox label {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
}
.form-group-checkbox a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}
.form-group-checkbox a:hover {
    text-decoration: underline;
}


/* --- Branding Column (Right) --- */
.branding-column {
    flex: 1;
    background: var(--blue-gradient);
    color: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem;
    text-align: center;
}

.branding-content h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.branding-content > p {
    font-size: 1.1rem;
    max-width: 400px;
    margin: 0 auto 2rem auto;
    opacity: 0.9;
}

.doctors-image {
    max-width: 100%;
    height: auto;
    margin-bottom: 2rem;
}

.qr-code-container {
    padding: 1rem;
    border-radius: 8px;
    display: inline-block;
    margin-bottom: 2rem;
}

.qr-code {
    width: 120px;
    height: 120px;
    display: block;
    margin: 0 auto 0.5rem auto;
}

.qr-code-container span {
    color: var(--text-color);
    font-size: 0.8rem;
    font-weight: 500;
}

.inquiries {
    font-size: 0.9rem;
}

/* --- Utility & Responsive --- */
.form_hidden {
    display: none;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s, visibility 0.2s;
}
.loading-overlay.is-visible {
    visibility: visible;
    opacity: 1;
}

.spinner {
    border: 8px solid #f3f3f3;
    border-top: 8px solid var(--primary-color);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 992px) {
    .registration-container {
        flex-direction: column;
    }
    .branding-column {
        display: none;
    }
    .form-column {
        padding: 2rem 1.5rem;
    }
    .main-container {
        margin: 1rem;
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 0;
    }
    .form-row .form-group {
        margin-bottom: 1.25rem;
    }
}