:root {
    --primary-color: #1a5dab;
    --primary-color-dark: #12427a;
    --secondary-color: #5a7a9e;
    --text-color: #1d3557;
    --bg-color: #f8f9fa;
    --white-color: #ffffff;
    --border-color: #dee2e6;
    --success-color: #2a9d8f;
    --error-color: #e53e3e;
    --focus-shadow: 0 0 0 3px rgba(26, 93, 171, 0.15);
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Nunito', sans-serif;
    --info-color: #3182ce;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    width: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.25s ease-out;
    border: 1px solid transparent;
    font-size: 15px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white-color);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(26, 93, 171, 0.25);
}

.btn-primary:hover {
    background-color: var(--primary-color-dark);
    border-color: var(--primary-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(26, 93, 171, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-color);
    border-color: var(--primary-color);
}

.register-page-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    padding: 50px 20px;
    width: 100%;
    overflow-x: hidden;
}

.register-container {
    max-width: 560px;
    width: 100%;
    background-color: var(--white-color);
    border-radius: 16px;
    box-shadow: 0 15px 40px rgba(29, 53, 87, 0.12);
    padding: 50px 60px;
}

.register-container h2 {
    font-family: var(--font-secondary);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
    margin-bottom: 12px;
}

.register-subtitle {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 35px;
    font-size: 1rem;
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.form-row .form-group {
    margin-bottom: 0;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    pointer-events: none;
    z-index: 1;
}

.password-info-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    cursor: help;
    z-index: 2;
}

.password-info-icon i {
    color: var(--info-color);
    font-size: 18px;
    transition: color 0.3s ease;
}

.password-info-icon:hover i {
    color: var(--primary-color);
}

.password-tooltip {
    position: absolute;
    right: -10px;
    bottom: calc(100% + 15px);
    background-color: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 18px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    min-width: 300px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.password-tooltip::after {
    content: '';
    position: absolute;
    bottom: -8px;
    right: 20px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--white-color);
}

.password-info-icon:hover .password-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.password-tooltip ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.password-tooltip ul li {
    padding: 8px 0;
    font-size: 0.875rem;
    color: var(--text-color);
    position: relative;
    padding-left: 26px;
    line-height: 1.5;
}

.password-tooltip ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 8px;
    color: var(--success-color);
    font-weight: bold;
    font-size: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.form-group input {
    width: 100%;
    padding: 12px 16px 12px 45px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.password-group input {
    padding-right: 50px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--focus-shadow);
}

.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 5px;
    display: block;
}

.form-check {
    margin-bottom: 25px;
}

.form-check label {
    padding-left: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--secondary-color);
    position: relative;
    display: inline-block;
}

.form-check label a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.form-check label a:hover {
    text-decoration: underline;
}

.form-check input {
    opacity: 0;
    position: absolute;
}

.form-check label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 1px;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.2s;
}

.form-check input:checked+label::before {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check input:checked+label::after {
    content: '✔';
    position: absolute;
    left: 4px;
    top: 2px;
    font-size: 14px;
    color: var(--white-color);
}

.register-container .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
}

.captcha-group {
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
}

.login-prompt {
    text-align: center;
    margin-top: 25px;
    font-size: 0.95rem;
    color: var(--secondary-color);
}

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

.security-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 25px;
    font-size: 0.85rem;
    color: var(--secondary-color);
}

.security-notice svg {
    color: var(--success-color);
}

.security-notice strong {
    font-weight: 600;
    color: var(--text-color);
}

@media (max-width: 768px) {
    .password-tooltip {
        right: 0;
        left: auto;
        min-width: 280px;
        max-width: 280px;
    }

    .password-tooltip::after {
        right: 20px;
        left: auto;
    }
}

@media (max-width: 576px) {
    body {
        background-color: var(--white-color);
    }

    .register-page-section {
        padding: 40px 0 0 0;
        align-items: flex-start;
    }

    .register-container {
        border-radius: 0;
        box-shadow: none;
        padding: 40px 25px;
        max-width: 100%;
    }

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

    .form-row .form-group {
        margin-bottom: 20px;
    }

    .password-tooltip {
        right: 0;
        left: auto;
        min-width: calc(100vw - 70px);
        max-width: calc(100vw - 70px);
    }

    .password-tooltip::after {
        right: 30px;
        left: auto;
    }
}

@media (max-width: 400px) {
    .register-container {
        padding: 40px 20px;
    }

    .password-tooltip {
        min-width: calc(100vw - 60px);
        max-width: calc(100vw - 60px);
    }
}