/**
 * Authentication Pages - Shared Styles
 * Extends theme.css for login, signup, password reset, and profile pages
 * All colors use CSS variables from theme.css
 */

/* ============================================ */
/* AUTH PAGE LAYOUT */
/* ============================================ */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: var(--bg-primary);
}

.auth-container {
    width: 100%;
    max-width: 440px;
}

/* ============================================ */
/* AUTH CARD */
/* ============================================ */

.auth-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: 1rem;
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

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

.auth-logo {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ============================================ */
/* AUTH FORM */
/* ============================================ */

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-input.error {
    border-color: var(--color-error);
}

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

/* Password input with toggle */
.password-wrapper {
    position: relative;
}

.password-wrapper .form-input {
    padding-right: 3rem;
}

.password-toggle {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-tertiary);
    padding: 0.25rem;
    font-size: 1.25rem;
    line-height: 1;
}

.password-toggle:hover {
    color: var(--text-secondary);
}

/* ============================================ */
/* PASSWORD STRENGTH INDICATOR */
/* ============================================ */

.password-strength {
    margin-top: 0.5rem;
}

.strength-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.25rem;
}

.strength-fill {
    height: 100%;
    width: 0;
    border-radius: 2px;
    transition: width 0.3s ease, background-color 0.3s ease;
}

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

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

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

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

.strength-text {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.strength-text.weak { color: var(--color-error); }
.strength-text.fair { color: var(--color-warning); }
.strength-text.good { color: var(--color-primary); }
.strength-text.strong { color: var(--color-success); }

/* ============================================ */
/* FORM HELP TEXT & ERRORS */
/* ============================================ */

.form-help {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 0.25rem;
}

.form-error {
    font-size: 0.8125rem;
    color: var(--color-error);
    margin-top: 0.25rem;
    display: none;
}

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

/* ============================================ */
/* CHECKBOX & REMEMBER ME */
/* ============================================ */

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-checkbox input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-checkbox label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ============================================ */
/* AUTH BUTTONS */
/* ============================================ */

.auth-btn {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.auth-btn-primary {
    background: var(--color-primary);
    color: var(--text-inverse);
}

.auth-btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary-sm);
}

.auth-btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-primary);
}

.auth-btn-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--color-primary);
}

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

/* Loading state */
.auth-btn.loading {
    position: relative;
    color: transparent;
}

.auth-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1.25rem;
    height: 1.25rem;
    margin: -0.625rem 0 0 -0.625rem;
    border: 2px solid var(--text-inverse);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================ */
/* AUTH LINKS */
/* ============================================ */

.auth-link {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* ============================================ */
/* AUTH FOOTER */
/* ============================================ */

.auth-footer {
    margin-top: 1.5rem;
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-primary);
}

.auth-footer-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================ */
/* AUTH ALERTS */
/* ============================================ */

.auth-alert {
    padding: 0.875rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: none;
}

.auth-alert.visible {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.auth-alert-warning {
    background: var(--bg-warning-light);
    color: var(--text-warning);
    border: 1px solid var(--border-warning);
}

.auth-alert-icon {
    flex-shrink: 0;
}

/* ============================================ */
/* DIVIDER */
/* ============================================ */

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

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

.auth-divider-text {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================ */
/* SOCIAL LOGIN BUTTONS */
/* ============================================ */

.social-btn {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.2s ease;
}

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

.social-btn-icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* ============================================ */
/* PROFILE PAGE SPECIFIC */
/* ============================================ */

.profile-section {
    margin-bottom: 2rem;
}

.profile-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-primary);
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.profile-stat {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
}

.profile-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.profile-stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tier-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tier-badge.free {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.tier-badge.basic {
    background: var(--bg-primary-light);
    color: var(--color-primary);
}

.tier-badge.pro {
    background: var(--badge-success-bg);
    color: var(--text-success);
}

.tier-badge.enterprise {
    background: var(--badge-warning-bg);
    color: var(--text-warning);
}

/* ============================================ */
/* RESPONSIVE */
/* ============================================ */

@media (max-width: 480px) {
    .auth-page {
        padding: 1rem 0.75rem;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .auth-title {
        font-size: 1.5rem;
    }

    .form-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .profile-stats {
        grid-template-columns: 1fr 1fr;
    }
}