/* ==========================================================================
   ACERO SHOP V1 - Authentication Pages Styles
   Login, Register, Password Reset styles
   Version: 1.0.0
   ========================================================================== */

/* --- Auth Page Layout --- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-50);
    padding: var(--space-4);
}

.auth-container {
    width: 100%;
    max-width: 440px;
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.auth-header {
    padding: var(--space-8) var(--space-6) var(--space-4);
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
}

.auth-logo {
    display: inline-block;
    margin-bottom: var(--space-4);
}

.auth-logo img {
    height: 48px;
    width: auto;
    margin: 0 auto;
    filter: brightness(0) invert(1);
}

.auth-logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: 1px;
}

.auth-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-top: var(--space-2);
    color: var(--color-white);
}

.auth-subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-top: var(--space-1);
}

.auth-body {
    padding: var(--space-6);
}

.auth-footer {
    padding: var(--space-4) var(--space-6);
    text-align: center;
    border-top: var(--border-width) solid var(--color-gray-200);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.auth-footer a {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

.auth-footer a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* --- Auth Form --- */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

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

.auth-form .form-label {
    font-weight: var(--font-weight-medium);
}

.auth-form .btn {
    margin-top: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

.auth-forgot {
    text-align: right;
    margin-top: calc(-1 * var(--space-2));
}

.auth-forgot a {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
}

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

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: var(--space-4) 0;
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-gray-200);
}

/* --- Social Auth Buttons --- */
.auth-social {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.auth-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    background: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-800);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.auth-social-btn:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

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

.auth-social-btn.google {
    border-color: #DB4437;
    color: #DB4437;
}

.auth-social-btn.google:hover {
    background: #FEF2F1;
}

.auth-social-btn.facebook {
    border-color: #4267B2;
    color: #4267B2;
}

.auth-social-btn.facebook:hover {
    background: #EEF1F8;
}

/* --- Password Strength Indicator --- */
.password-strength {
    margin-top: var(--space-2);
}

.password-strength-bar {
    height: 4px;
    border-radius: var(--border-radius-full);
    background: var(--color-gray-200);
    overflow: hidden;
    transition: background var(--transition-normal);
}

.password-strength-fill {
    height: 100%;
    border-radius: var(--border-radius-full);
    transition: width var(--transition-normal), background var(--transition-normal);
    width: 0%;
}

.password-strength-text {
    font-size: var(--font-size-xs);
    margin-top: var(--space-1);
    color: var(--color-gray-500);
}

.password-strength.weak .password-strength-fill {
    width: 25%;
    background: var(--color-error);
}

.password-strength.weak .password-strength-text {
    color: var(--color-error);
}

.password-strength.fair .password-strength-fill {
    width: 50%;
    background: var(--color-warning);
}

.password-strength.fair .password-strength-text {
    color: var(--color-warning);
}

.password-strength.good .password-strength-fill {
    width: 75%;
    background: var(--color-info);
}

.password-strength.good .password-strength-text {
    color: var(--color-info);
}

.password-strength.strong .password-strength-fill {
    width: 100%;
    background: var(--color-success);
}

.password-strength.strong .password-strength-text {
    color: var(--color-success);
}

/* --- Form Validation --- */
.form-input.is-invalid {
    border-color: var(--color-error);
}

.form-input.is-valid {
    border-color: var(--color-success);
}

.field-error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    margin-top: var(--space-1);
    display: none;
}

.field-error.visible {
    display: block;
}

/* --- Auth Messages --- */
.auth-message {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
    display: none;
}

.auth-message.visible {
    display: block;
}

.auth-message.error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.auth-message.success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.auth-message.info {
    background: var(--color-info-bg);
    color: var(--color-secondary);
    border: 1px solid var(--color-info);
}

/* --- Terms Checkbox --- */
.auth-terms {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-top: var(--space-1);
}

.auth-terms input[type="checkbox"] {
    margin-top: 3px;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.auth-terms a {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

.auth-terms a:hover {
    text-decoration: underline;
}

/* --- Back to Home Link --- */
.auth-back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--space-4);
}

.auth-back:hover {
    color: var(--color-primary);
}

.auth-back svg {
    width: 16px;
    height: 16px;
}

/* --- Responsive Adjustments --- */
@media (max-width: 479px) {
    .auth-page {
        padding: var(--space-2);
        align-items: flex-start;
        padding-top: var(--space-4);
    }

    .auth-container {
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
    }

    .auth-header {
        padding: var(--space-6) var(--space-4) var(--space-3);
    }

    .auth-body {
        padding: var(--space-4);
    }

    .auth-footer {
        padding: var(--space-3) var(--space-4);
    }

    .auth-title {
        font-size: var(--font-size-lg);
    }

    .auth-logo img {
        height: 36px;
    }

    .auth-logo-text {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 359px) {
    .auth-body {
        padding: var(--space-3);
    }

    .auth-form .btn {
        padding: var(--space-2) var(--space-4);
        font-size: var(--font-size-sm);
    }

    .form-input {
        padding: var(--space-2) var(--space-3);
    }

    .auth-header {
        padding: var(--space-4) var(--space-3) var(--space-2);
    }
}

@media (min-width: 768px) {
    .auth-page {
        background: linear-gradient(135deg, #fce4e0 0%, #f5f5f5 50%, #e8f4fd 100%);
    }

    .auth-container {
        box-shadow: var(--shadow-xl);
    }
}

/* --- Loading State --- */
.auth-loading {
    position: relative;
    pointer-events: none;
}

.auth-loading .btn {
    color: transparent !important;
}

.auth-loading .btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.auth-loading .form-input {
    opacity: 0.7;
}

/* --- Success Check Animation --- */
@keyframes checkmark {
    0% { stroke-dashoffset: 100; }
    100% { stroke-dashoffset: 0; }
}

.auth-success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: block;
}

.auth-success-icon circle {
    fill: var(--color-success-bg);
    stroke: var(--color-success);
    stroke-width: 3;
}

.auth-success-icon path {
    fill: none;
    stroke: var(--color-success);
    stroke-width: 3;
    stroke-dasharray: 100;
    animation: checkmark 0.5s ease forwards 0.2s;
}