:root {
    --color-white: #ffffff;
    --color-light: #f0eff5;
    --color-gray-light: #86848c;
    --color-gray-dark: #56555e;
    --color-dark: #27282f;
    --color-primary: #00D094;
    --color-success: #00D094;
    --color-danger: rgb(255, 67, 54);
    --color-warning: rgb(234, 181, 7);
    --color-purple: rgb(160, 99, 245);
    
    --color-primary-light: rgba(0, 208, 148, 0.25);
    --color-success-light: rgba(0, 208, 148, 0.25);
    --color-danger-light: rgba(255, 67, 54, 0.2);
    --color-purple-light: rgba(207, 159, 255, 0.2);
    
    --card-padding: 1.6rem;
    --padding-1: 1rem;
    --padding-2: 8px;
    
    --card-border-radius: 1.6rem;
    --border-radius-1: 1rem;
    --border-radius-2: 6px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    list-style: none;
    border: none;
    outline: none;
}

body {
    font-family: 'Poppins', sans-serif;
    background: radial-gradient(circle at top, rgba(0, 208, 148, 0.25) 0, #020806 55%, #020806 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    color: var(--color-white);
}

.auth-container {
    background: rgba(9, 26, 21, 0.98);
    border-radius: var(--card-border-radius);
    box-shadow: 0 2rem 4rem rgba(0, 0, 0, 0.6);
    width: 100%;
    max-width: 450px;
    overflow: hidden;
    position: relative;
    padding: var(--card-padding);
    border: 1px solid rgba(0, 208, 148, 0.25);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.tab-navigation {
    display: flex;
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--border-radius-1);
    padding: 0.4rem;
}

.tab-btn {
    flex: 1;
    padding: 0.8rem 1rem;
    background: transparent;
    border-radius: var(--border-radius-1);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-light);
    transition: all 300ms ease;
    font-family: 'Poppins', sans-serif;
}

.tab-btn:hover {
    color: var(--color-white);
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 0.5rem 1rem var(--color-primary-light);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-group {
    margin-bottom: 1.2rem;
    position: relative;
}

input:not([type="checkbox"]) {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--border-radius-1);
    color: var(--color-white);
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
}

input:not([type="checkbox"]):focus {
    border: 1px solid var(--color-primary);
}

input:not([type="checkbox"])::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.error-message {
    color: var(--color-danger);
    font-size: 0.8rem;
    margin-top: 0.4rem;
    display: none;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: 1.2rem;
    height: 1.2rem;
    cursor: pointer;
    accent-color: var(--color-primary);
    margin: 0;
}

.checkbox-group label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
}

.btn {
    width: 100%;
    padding: 1rem;
    border-radius: var(--border-radius-1);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 300ms ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 1rem 2rem var(--color-primary-light);
}

.btn-primary:hover {
    box-shadow: none;
    opacity: 0.9;
}

.divider {
    display: flex;
    align-items: center;
    margin: 2rem 0;
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-light);
}

.divider span {
    padding: 0 1rem;
}

.social-login {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.social-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem;
    border-radius: var(--border-radius-1);
    background: var(--color-white);
    border: 1px solid var(--color-light);
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    color: var(--color-dark);
    transition: all 300ms ease;
}

.social-btn:hover {
    background: var(--color-light);
}

.social-btn svg {
    width: 20px;
    height: 20px;
}

.forgot-link {
    text-align: center;
}

.forgot-link a {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.text-center {
    text-align: center;
    margin-bottom: 1rem;
}

.text-danger {
    color: var(--color-danger);
}