/* Общие стили для всего сайта */
.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-main {
    flex: 1;
    padding: 2rem 1rem;
}

.page-centered {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Шапка */
.app-header {
    background-color: var(--md-surface);
    color: var(--md-on-surface);
    box-shadow: var(--md-elevation-1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-logo {
    display: flex;
    align-items: center;
}

.app-logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.app-logo img {
    margin-right: 1rem;
    width: 40px;
    height: 40px;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--md-primary);
    text-decoration: none;
}

.app-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1rem;
}

.app-nav a {
    color: var(--md-on-surface-variant);
    text-decoration: none;
    padding: 0.75rem 1rem;
    transition: var(--md-transition-standard);
    border-radius: var(--md-shape-small);
    font-size: 0.875rem;
}

.app-nav a:hover {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface-variant);
}

.app-nav a.active {
    color: var(--md-primary);
    font-weight: 500;
}

/* Подвал */
.app-footer {
    background-color: #343a40;
    border-top: 1px solid var(--md-outline-variant);
    margin-top: 4rem;
    padding: 2rem 0;
    color: white;
}

.app-footer h5,
.app-footer p,
.app-footer li,
.app-footer a {
    color: white;
}

.app-footer a:hover {
    color: #ccc;
    text-decoration: underline;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    margin: 0;
    color: var(--md-on-surface-variant);
    font-size: 0.875rem;
}

.footer-nav {
    display: flex;
    gap: 2rem;
}

.footer-nav a {
    color: var(--md-on-surface-variant);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--md-primary);
}

/* === Skip Link for Accessibility === */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    padding: 8px 12px;
    text-decoration: none;
    border-radius: var(--md-shape-small);
    z-index: 10000;
    transition: top 0.3s ease;
}

.skip-link:focus,
.visually-hidden-focusable:focus {
    top: 6px;
}

/* === Form Text Helper === */
.form-text {
    font-size: 0.875rem;
    color: var(--md-on-surface-variant);
    margin-top: 0.25rem;
}

/* === Notification Close Button === */
.notification-close {
    background: none;
    border: none;
    color: var(--md-on-surface-variant);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    margin-left: auto;
    flex-shrink: 0;
}

.notification-close:hover {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface);
}

/* === Text Colors for Notifications === */
.text-success {
    color: var(--md-primary) !important;
}

.text-error {
    color: var(--md-error) !important;
}

.text-warning {
    color: #FF9800 !important;
}

.text-info {
    color: #2196F3 !important;
}

/* === Button Size Variants === */
.btn-sm {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.btn-icon.btn-sm {
    width: 2rem;
    height: 2rem;
}

/* === Language Switcher Improvements === */
.language-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.language-btn {
    cursor: pointer;
    padding: 5px 10px;
    text-decoration: none;
    color: #666;
    border-radius: 4px;
    margin-left: 5px;
}

.language-btn.active {
    font-weight: bold;
    background-color: #4487FF;
    color: white;
}

/* === License Page Styles === */
.license-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

.license-text {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 30px;
    white-space: pre-line;
    font-size: 14px;
    line-height: 1.6;
}

.license-title {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #dee2e6;
}

.language-tabs {
    margin-bottom: 20px;
}

.language-tabs .nav-link.active {
    font-weight: bold;
    background-color: #f8f9fa;
}

/* Старые стили для .lang-btn оставляем для обратной совместимости */
.lang-btn {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    margin: 0 0.25rem;
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-shape-small);
    color: var(--md-on-surface-variant);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface);
}

.lang-btn.active {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    border-color: var(--md-primary);
}

/* === Responsive Footer === */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .app-footer {
        margin-top: 2rem;
        padding: 1.5rem 0;
    }
}

/* === High Contrast Mode === */
@media (prefers-contrast: high) {
    .skip-link {
        border: 2px solid;
    }
    
    .notification {
        border: 1px solid;
    }
    
    .btn-icon {
        border: 1px solid var(--md-outline);
    }
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
    .skip-link,
    .lang-btn,
    .footer-nav a,
    .notification-close {
        transition: none;
    }
}

/* === Print Styles === */
@media print {
    .app-footer,
    .language-switcher,
    .skip-link {
        display: none !important;
    }
}

/* Карточки контента */
.content-card {
    background-color: var(--md-surface);
    border-radius: var(--md-shape-medium);
    box-shadow: var(--md-elevation-1);
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
}

.card-title {
    color: var(--md-on-surface);
    margin: 0 0 1.5rem;
    font-size: 1.5rem;
    font-weight: 500;
}

.card-content {
    margin-bottom: 1.5rem;
}

/* Переключатель языка */
.language-switcher {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 101;
}

.lang-btn {
    padding: 0.5rem 0.75rem;
    border-radius: var(--md-shape-small);
    background-color: var(--md-surface);
    color: var(--md-on-surface-variant);
    text-decoration: none;
    font-size: 0.75rem;
    transition: var(--md-transition-standard);
    box-shadow: var(--md-elevation-1);
}

.lang-btn:hover {
    background-color: var(--md-surface-variant);
}

.lang-btn.active {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

/* Уведомления */
.notification {
    padding: 1rem;
    border-radius: var(--md-shape-small);
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.notification-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notification-content {
    flex-grow: 1;
}

.notification-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.notification-message {
    margin: 0;
    font-size: 0.875rem;
}

.notification-success {
    background-color: #e6f4ea;
    color: #137333;
}

.notification-error {
    background-color: var(--md-error-container);
    color: var(--md-on-error-container);
}

.notification-warning {
    background-color: #fef7e0;
    color: #b06000;
}

.notification-info {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

/* Адаптивность */
@media (max-width: 768px) {
    .app-header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .app-nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .language-switcher {
        position: static;
        justify-content: center;
        margin-bottom: 1rem;
    }
    
    .app-footer-links {
        flex-direction: column;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .app-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    
    .app-footer-links {
        flex-direction: column;
        gap: 12px;
    }
}