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


.auth-container {
    background:rgb(75, 75, 161);
    border-radius: 16px;
    width: 100%;
    max-width: 420px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    margin-top: 100px;
}

.tabs {
    display: flex;
    background: #1e1e2e;
}

.tab {
    flex: 1;
    padding: 18px;
    text-align: center;
    cursor: pointer;
    color: #888;
    font-weight: 500;
    font-size: 15px;
    border: none;
    outline: none;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.tab:hover {
    color: #aaa;
}

.tab.active {
    color: #4dd0e1;
    border-bottom-color: #4dd0e1;
    background: #2a2a3e;
}

.form-container {
    padding: 30px;
}

.form {
    display: none;
}

.form.active {
    display: block;
}

.form-title {
    color: #fff;
    font-size: 24px;
    margin-bottom: 8px;
}

.form-subtitle {
    color: #ccc;
    font-size: 14px;
    margin-bottom: 25px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    color: #ccc;
    font-size: 13px;
    margin-bottom: 8px;
}



.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: #1e1e2e;
    border: 2px solid #3a3a4e;
    border-radius: 10px;
    color: #fff;
    font-size: 14px;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #4dd0e1;
    box-shadow: 0 0 0 3px rgba(77, 208, 225, 0.1);
}

.input-group input.error {
    border-color: #ff6b6b;
}

.input-group input.success {
    border-color: #51cf66;
}

.error-message {
    color: #ff6b6b;
    font-size: 12px;
    margin-top: 6px;
    display: none;
}

.error-message.show {
    display: block;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
}

.checkbox-wrapper {
    position: relative;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.checkbox-wrapper input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    background: #1e1e2e;
    border: 2px solid #3a3a4e;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.checkbox-wrapper input:hover ~ .checkmark {
    border-color: #4dd0e1;
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid #4dd0e1;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-wrapper input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-wrapper input:checked ~ .checkmark {
    border-color: #4dd0e1;
}

.checkbox-group label {
    color: #aaa;
    font-size: 13px;
    line-height: 1.4;
    cursor: pointer;
}

.checkbox-group label a {
    color: #4dd0e1;
    text-decoration: none;
}

.checkbox-group label a:hover {
    text-decoration: underline;
}

.checkbox-group.error .checkmark {
    border-color: #ff6b6b;
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #4dd0e1 0%, #26c6da 100%);
    border: none;
    border-radius: 10px;
    color: #1a1a2e;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(77, 208, 225, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.alert {
    padding: 14px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 13px;
    display: none;
}

.alert.show {
    display: block;
}

.alert.error {
    background: rgba(255, 107, 107, 0.15);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: #ff6b6b;
}

.alert.success {
    background: rgba(81, 207, 102, 0.15);
    border: 1px solid rgba(81, 207, 102, 0.3);
    color: #51cf66;
}

.divider {
    display: flex;
    align-items: center;
    margin: 25px 0;
    font-size: 12px;
}

.divider::before,
.divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: #3a3a4e;
}

.divider span {
    padding: 0 15px;
    color: #fff;
}

.social-login {
    display: flex;
    gap: 12px;
}

.social-btn {
    flex: 1;
    padding: 12px;
    background: #1e1e2e;
    border: 2px solid #3a3a4e;
    border-radius: 10px;
    color: #ccc;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.social-btn:hover {
    border-color: #4dd0e1;
    color: #fff;
}

.forgot-link {
    text-align: center;
    margin-top: 20px;
}

.forgot-link a {
    color: #4dd0e1;
    text-decoration: none;
    font-size: 13px;
}

.forgot-link a:hover {
    text-decoration: underline;
}

/* Loading spinner */
.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid #1a1a2e;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.submit-btn.loading .spinner {
    display: inline-block;
}

.submit-btn.loading .btn-text {
    opacity: 0.7;
}

/* Shake animation */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.3s ease;
}