/* Base layout styles */
:root {
    --header-height: 60px;
    --sidebar-width: 250px;
    --footer-height: 60px;
    --primary-color: #5B9BD5;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #fff;
    --dark-color: #383a3f;
    --transition-speed: 0.3s;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
}

/* Layout container */
.layout-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    /* background-color задается через настройки цветовой схемы в base.html */
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1000;
}

.header-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Logo styles */
.logo {
    display: flex;
    align-items: center;
}

.header-logo {
    height: 40px;
    width: auto;
    transition: transform var(--transition-speed);
}

.header-logo:hover {
    transform: scale(1.05);
}

/* Navigation styles */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 1.5rem;
}

.nav-list a {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed);
}

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

/* Auth buttons */
.auth-buttons {
    display: flex;
    gap: 0.5rem;
}

.auth-buttons .btn {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    transition: all var(--transition-speed);
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
    .nav-list a {
        color: var(--light-color);
    }
    
    .nav-list a:hover {
        color: var(--primary-color);
    }
}

/* Mobile menu */
@media (max-width: 768px) {
    .header-container {
        padding: 0 0.5rem;
    }

    .nav-list {
        display: none;
    }

    .auth-buttons {
        gap: 0.25rem;
    }

    .auth-buttons .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.9rem;
    }
}

/* Main content area */
.main-content {
    display: flex;
    flex: 1;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--light-color);
    border-right: 1px solid rgba(0,0,0,0.1);
    transition: transform var(--transition-speed);
}

.sidebar-container {
    padding: 1rem;
    height: 100%;
}

/* Content area */
.content {
    flex: 1;
    padding: 1rem;
    background: #fff;
}

.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Promo section */
.promo {
    background: var(--light-color);
    color: white;
    padding: 2rem 0;
}

.promo:empty {
    display: none;
}

.promo-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Footer */
.footer {
    background: var(--light-color);
    color: var(--dark-color);
    height: var(--footer-height);
}

.footer-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
}

/* Responsive design */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 200px;
    }
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid rgba(0,0,0,0.1);
    }

    .content {
        width: 100%;
    }
}

/* Utility classes */
.flex-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.flex-item {
    flex: 1;
    min-width: 250px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

/* Dark mode support */
@media (prefers-color-scheme: light) {
    body {
        background-color: #1a1a1a;
        color: #ffffff;
    }

    .header, .sidebar {
        background-color: #2d2d2d;
    }

    .content {
        background-color: #1a1a1a;
    }

    .footer {
        background-color: var(--light-color);
    }
}