/* Header layout */
.main-header {
    background-color: var(--color-header-bg);
    color: var(--color-header-text);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.main-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-left, .nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.main-header a {
    color: var(--color-header-text);
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    transition: all 0.2s ease;
}

.main-header ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    margin: 0;
    padding: 0;
    align-items: center;
}

.main-header ul li a {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.main-header ul li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.main-header ul li a.active {
    background-color: rgba(255, 255, 255, 0.3);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

/* Admin Tabs Styles */
.admin-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 0;
    white-space: nowrap;
}

.admin-tab {
    padding: 12px 24px;
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    border-bottom: none;
    margin-bottom: -2px;
}

.admin-tab:hover {
    background-color: rgba(66, 184, 180, 0.05);
    color: var(--color-primary);
}

.admin-tab.active {
    background-color: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-border);
    border-bottom: 2px solid var(--color-surface);
    position: relative;
    z-index: 1;
}

.logo {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-right: var(--spacing-md);
}

/* Responsive Theme Logo Logic */
.logo-img {
    height: 40px;
    width: auto;
    display: none;
}

/* 1. Default (Light Theme, Desktop) */
.logo-light-desktop { display: block; }

/* 2. Default Mobile (Light Theme) */
@media (max-width: 768px) {
    .logo-light-desktop { display: none; }
    .logo-light-mobile { display: block; }
}

/* 3. Явно выбранная тёмная тема (data-dark ставит сервер, см. users.User.DARK_THEMES) */
html[data-dark] .logo-light-desktop,
html[data-dark] .logo-light-mobile { display: none !important; }

html[data-dark] .logo-dark-desktop { display: block; }

@media (max-width: 768px) {
    html[data-dark] .logo-dark-desktop { display: none !important; }
    html[data-dark] .logo-dark-mobile { display: block; }
}

/* Перекрашиваем белый логотип в акцент Dark Solarized Osaka (magenta). */
html[data-theme="solarized_osaka"] .logo-dark-desktop,
html[data-theme="solarized_osaka"] .logo-dark-mobile {
    filter: invert(35%) sepia(52%) saturate(2878%) hue-rotate(316deg) brightness(101%) contrast(101%);
}

/* 4. OS Dark Theme Preference (when no explicit theme is set) */
@media (prefers-color-scheme: dark) {
    html:not([data-theme]) .logo-light-desktop, html[data-theme="auto"] .logo-light-desktop,
    html:not([data-theme]) .logo-light-mobile, html[data-theme="auto"] .logo-light-mobile { display: none !important; }
    
    html:not([data-theme]) .logo-dark-desktop, html[data-theme="auto"] .logo-dark-desktop { display: block; }
}

@media (prefers-color-scheme: dark) and (max-width: 768px) {
    html:not([data-theme]) .logo-dark-desktop, html[data-theme="auto"] .logo-dark-desktop { display: none !important; }
    html:not([data-theme]) .logo-dark-mobile, html[data-theme="auto"] .logo-dark-mobile { display: block; }
}

/* Footer layout */
.main-footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
}