img { 
    filter: var(--invert-img);
    transition: filter 1s ease;
} 

.register-section {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 0 60px;
    background-color: var(--bg-color);
    min-height: calc(100vh - 70px);
}

@media (max-width: 768px) {
    .register-section {
        padding: 90px 0 40px;
    }
}

.register-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    width: 100%;
    max-width: 420px;
    padding: 1.8rem 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.register-card h1 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.2rem;
    line-height: 1.2;
}

.register-card .subhead {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    border-left: 3px solid var(--primary);
    padding-left: 0.7rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 0 4px 4px 0;
    line-height: 1.4;
}

.form-row {
    margin-bottom: 0.8rem;
    position: relative;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.15rem;
    letter-spacing: 0.2px;
}

label i {
    font-style: normal;
    color: var(--danger);
    margin-left: 2px;
}

.input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: 14px;
    padding: 0 0.8rem;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px var(--shadow-color);
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.25);
}

.input-wrapper .icon {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-right: 0.4rem;
    width: 24px;
    text-align: center;
    transition: color 0.3s ease;
}

input {
    width: 100%;
    border: none;
    padding: 0.6rem 0;
    font-size: 1rem;
    background: transparent;
    color: var(--text-primary);
    outline: none;
}

input::placeholder {
    color: var(--text-muted);
    font-weight: 300;
    font-size: 0.95rem;
    opacity: 0.7;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.8rem 0 0.5rem;
}

.checkbox-row input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary);
    cursor: pointer;
}

.checkbox-row label {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.checkbox-row a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px dotted var(--border-color);
    transition: color 0.3s ease;
}

.checkbox-row a:hover {
    color: var(--accent);
    border-bottom: 1px solid var(--accent);
}

button {
    background: linear-gradient(115deg, var(--primary), var(--accent));
    border: none;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.7rem 1.3rem;
    border-radius: 40px;
    width: 100%;
    cursor: pointer;
    box-shadow: 0 8px 15px -8px var(--primary);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 0.3rem;
}

button:hover {
    background: linear-gradient(115deg, var(--primary-dark), var(--accent-dark));
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -6px var(--primary);
}

.footer-links {
    text-align: center;
    margin-top: 0.8rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px dotted var(--border-color);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent);
    border-bottom: 1px solid var(--accent);
}

hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-color), transparent);
    margin: 0.8rem 0 0.3rem;
}

.form-message {
    min-height: 18px;
    font-size: 0.8rem;
    margin-top: 2px;
    padding-left: 0.8rem;
    color: var(--danger);
    line-height: 1.3;
}

@media (max-width: 400px) {
    .register-card {
        padding: 1.3rem;
    }
    .register-card h1 {
        font-size: 1.8rem;
    }
}