/* CSS Color Variables from Logo */
:root {
    --primary-blue: #00539C;
    --primary-orange: #F7941D;
    --dark-gray: #4A4A4A;
    --light-gray-bg: #f0f2f5;
    --white: #FFFFFF;
    --text-color: #333;
    --border-color: #ddd;
}

/* General Reset & Body Styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-gray-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 40px 0;
    color: var(--text-color);
}

/* Main Registration Container */
.register-container {
    display: flex;
    width: 1000px;
    max-width: 95%;
    background-color: var(--white);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    overflow: hidden;
}

/* Left Branding Panel */
.branding-panel {
    flex-basis: 40%;
    background: var(--primary-blue);
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    text-align: center;
    transition: padding 0.3s ease;
}

.branding-panel .logo {
    max-width: 250px;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
    transition: max-width 0.3s ease;
}

.branding-panel h1 {
    font-weight: 700;
    font-size: 1.8rem;
    margin-bottom: 10px;
    transition: font-size 0.3s ease;
}

.branding-panel p {
    font-weight: 400;
    font-size: 1rem;
    max-width: 300px;
    transition: font-size 0.3s ease;
}

/* Right Form Panel */
.form-panel {
    flex-basis: 60%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 50px;
    position: relative;
}

.back-home-button {
    position: absolute;
    top: 30px;
    right: 30px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    border: 2px solid var(--primary-blue);
    border-radius: 8px;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}
.back-home-button:hover {
    background-color: var(--primary-blue);
    color: var(--white);
}

.form-panel h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.form-panel .subtitle {
    font-size: 1rem;
    color: #777;
    margin-bottom: 30px;
}

.form-row {
    display: flex;
    gap: 20px;
}
.form-row .form-group {
    flex: 1;
}

.form-group {
    margin-bottom: 18px;
}

.input-wrapper {
    position: relative;
}

.input-wrapper .icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #aaa;
    font-size: 1.1rem;
    pointer-events: none;
}

.form-panel input, .form-panel select {
    width: 100%;
    padding: 12px 20px 12px 45px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s, box-shadow 0.3s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--white);
}

.input-wrapper select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px 12px;
}

.form-panel select:invalid {
    color: #999;
}
.form-panel option {
    color: var(--text-color);
}

.form-panel input::placeholder {
    color: #aaa;
}

.form-panel input:focus, .form-panel select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 83, 156, 0.15);
}

.form-group-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: #555;
    margin: 20px 0;
}
.form-group-checkbox input[type="checkbox"] {
    opacity: 0;
    position: absolute;
    width: 0;
    height: 0;
}
.form-group-checkbox label {
    position: relative;
    padding-left: 28px;
    cursor: pointer;
    display: inline-block;
    line-height: 20px;
}
.form-group-checkbox label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    background-color: var(--white);
    border-radius: 4px;
    transition: all 0.2s ease;
}
.form-group-checkbox input[type="checkbox"]:checked + label::before {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
}
.form-group-checkbox input[type="checkbox"]:checked + label::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 3px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
.form-group-checkbox input[type="checkbox"]:focus + label::before {
    box-shadow: 0 0 0 3px rgba(0, 83, 156, 0.15);
}
.form-group-checkbox a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}
.form-group-checkbox a:hover {
    text-decoration: underline;
}

.register-button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    background-color: var(--primary-orange);
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    margin-top: 10px;
}
.register-button:hover {
    background-color: #e08411;
    transform: translateY(-2px);
}

.login-link {
    text-align: center;
    margin-top: 25px;
    font-size: 0.95rem;
}
.login-link a {
    color: var(--primary-orange);
    font-weight: 600;
    text-decoration: none;
}
.login-link a:hover {
    text-decoration: underline;
}

/* --- RESPONSIVE DESIGN --- */

/* For Tablets and smaller devices */
@media (max-width: 920px) {
    .register-container {
        flex-direction: column;
        width: 500px;
    }

    .branding-panel {
        flex-basis: auto;
        padding: 50px 30px; 
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }

    .branding-panel .logo {
        max-width: 200px;
        margin-bottom: 15px;
    }

    .branding-panel h1 { 
        font-size: 1.5rem; 
    }

    .form-panel {
        flex-basis: auto;
        padding: 50px 40px 40px;
        border-bottom-left-radius: 12px;
        border-bottom-right-radius: 12px;
        border-top-left-radius: 0;
        border-top-right-radius: 0;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* For small mobile phones */
@media (max-width: 540px) {
    body { 
        padding: 0; 
        align-items: flex-start;
    }
    .register-container {
        width: 100%;
        max-width: 100%;
        border-radius: 0;
        box-shadow: none;
    }
    
    .branding-panel {
        padding: 40px 20px;
        border-radius: 0;
    }

    .branding-panel h1 {
        font-size: 1.3rem;
    }

    .branding-panel p {
        font-size: 0.9rem;
    }

    .form-panel { 
        padding: 50px 30px 40px; 
        border-radius: 0;
    }

    .back-home-button {
        top: 20px;
        right: 20px;
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .form-panel h2 {
        margin-top: 20px;
    }
}