:root {
    --bg-primary: #1c1714;
    --bg-secondary: #2a2420;
    
    --text-primary: #e8e3dc;
    --text-secondary: rgba(232, 227, 220, 0.8);
    --text-muted: rgba(232, 227, 220, 0.7);
    --text-light: rgba(232, 227, 220, 0.6);
    --text-subtle: rgba(232, 227, 220, 0.5);
    
    --accent-primary: #a6876b;
    --accent-secondary: #8b6f47;
    --accent-tertiary: #6d5a3e;
    --accent-bright: #7a9e7e;
    
    --overlay-subtle: rgba(232, 227, 220, 0.05);
    --overlay-light: rgba(232, 227, 220, 0.1);
    --overlay-medium: rgba(232, 227, 220, 0.2);
    --overlay-dark: rgba(26, 24, 22, 0.4);
    
    --sidebar-width: 320px;
    --sidebar-width-tablet: 280px;
    --container-max-width: 1400px;
    
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    --spacing-2xl: 50px;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-full: 50%;
    
    --transition-fast: 0.3s ease;
    --transition-medium: 0.4s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scrollbar-gutter: stable;
}

* {
    scrollbar-width: auto;
    scrollbar-color: var(--accent-primary) var(--bg-secondary);
}

*::-webkit-scrollbar {
    width: 12px;
}

*::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

*::-webkit-scrollbar-thumb {
    background-color: var(--accent-primary);
    border-radius: 6px;
    border: 3px solid var(--bg-secondary);
}

*::-webkit-scrollbar-thumb:hover {
    background-color: var(--accent-bright);
}


body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
}


.container {
    display: flex;
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    min-height: 100vh;
}

@media (min-width: 769px) {
    html, body {
        overflow: hidden;
        height: 100vh;
    }

    .container {
        height: 100vh;
        overflow: hidden;
    }

    .main-content {
        min-height: 0;
        overflow: hidden;
    }

    .content-area {
        min-height: 0;
    }
}

.main-content {
    flex: 1;
    margin-left: calc(var(--sidebar-width) + var(--spacing-md));
    padding: var(--spacing-md) var(--spacing-md);
    display: flex;
    flex-direction: column;
    scrollbar-gutter: stable;
}

.tab-navigation {
    display: flex;
    gap: 4px;
    margin-bottom: 0;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
    min-height: 48px;
    align-items: flex-end;
}

.tab-button {
    padding: 14px 28px 16px;
    background-color: #221f1d;
    border: 1px solid rgba(232, 227, 220, 0.1);
    border-bottom: none;
    color: var(--text-light);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-radius: 12px 12px 0 0;
    transform: translateY(0);
    box-shadow: 
        0 3px 0 0 var(--bg-secondary),
        6px -4px 12px -6px rgba(0,0,0,0.4),
        -6px -4px 12px -6px rgba(0,0,0,0.4),
        0 -8px 16px -8px rgba(0,0,0,0.4);
    margin-left: -12px;
}

.tab-button:first-child {
    margin-left: 0;
}



.tab-button:hover {
    color: var(--accent-bright);
    background-color: #272422;
    border-color: rgba(122, 158, 126, 0.3);
    box-shadow: 0 -2px 8px rgba(122, 158, 126, 0.15);
}

.tab-button.active {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    transform: translateY(2px);
    border-color: rgba(232, 227, 220, 0.15);
    border-bottom: none;
    border-radius: 12px 12px 2px 2px;
    z-index: 20 !important;
    box-shadow: 
        0 3px 0 0 var(--bg-secondary),
        0 -6px 12px -6px rgba(0,0,0,0),
        6px -4px 12px -6px rgba(0,0,0,0.8),
        -6px -4px 12px -6px rgba(0,0,0,0.8),
        0 -8px 20px -4px rgba(0,0,0,0.2),
        inset 0 1px 0 rgba(232, 227, 220, 0.1)
}

.tab-button.active:first-child {
    border-radius: 12px 12px 2px 2px;
    box-shadow: 
        0 3px 0 0 var(--bg-secondary),
        6px -4px 12px -6px rgba(0,0,0,0.8),
        -6px -4px 12px -6px rgba(0,0,0,0.8),
        0 -8px 20px -4px rgba(0,0,0,0.4),
        inset 0 1px 0 rgba(232, 227, 220, 0.1)
}

.content-area {
    flex: 1;
    z-index: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-secondary);
    border-radius: 0px 12px 12px 12px;
    padding: var(--spacing-sm) 1px;
    min-height: 600px;
    border: 1px solid rgba(232, 227, 220, 0.15);
    border-top: none;
    box-shadow: 
        0 -6px 12px -6px rgba(0,0,0,0.8),
        6px -4px 12px -6px rgba(0,0,0,0.8),
        -6px -4px 12px -6px rgba(0,0,0,0.8),
        0 -8px 16px -8px rgba(0,0,0,0.8),
        0 6px 16px -4px rgba(0,0,0,0.8);
    position: relative;
}

.content-area-inner {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: var(--spacing-2xl);
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
    0% {
        opacity: 0;
        transform: translateX(30px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}


.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.section-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
}

@media (max-width: 1024px) {
    .main-content {
        margin-left: calc(var(--sidebar-width-tablet) + var(--spacing-md));
        padding: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    html, body {
        overflow: visible;
        height: auto;
    }

    .container {
        flex-direction: column;
        height: auto;
        overflow: visible;
        min-height: 100vh;
    }

    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
        min-height: auto;
        overflow: visible;
    }

    .content-area {
        border-radius: 0px 0px 12px 12px;
        padding: 0;
        min-height: 600px;
        overflow: visible;
    }

    .content-area-inner {
        overflow: visible;
        min-height: auto;
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .tab-button {
        padding: 14px 26px 16px;
    }
}

@media (max-width: 480px) {
    .tab-navigation {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0 0;
    }

    .tab-button {
        padding: 14px 12px 16px;
        margin-left: 0;
        font-size: 12px;
        min-height: 44px;
    }

    .tab-button:first-child {
        border-bottom-right-radius: 0;
        border-bottom-left-radius: 0;
        transform: translateY(7px);
    }
    .tab-button:first-child.active {
        transform: translateY(2px);
        border-bottom: 1px solid rgba(232, 227, 220, 0.15);
    }

    .tab-button:nth-child(2) {
        border-bottom-left-radius: 0;
        transform: translateY(7px);
    }
    .tab-button:nth-child(2).active {
        transform: translateY(2px);
        border-bottom: 1px solid rgba(232, 227, 220, 0.15);
    }

    .tab-button:nth-child(3) {
        border-top-right-radius: 0;
        border-top-left-radius: 0;
    }
    .tab-button:nth-child(3).active {
        border-top-right-radius: 10px;
        border-top-left-radius: 10px;
    }

    .tab-button:nth-child(4) {
        border-top-right-radius: 0;
        border-top-left-radius: 0;
    }
    .tab-button:nth-child(4).active {
        border-top-right-radius: 10px;
        border-top-left-radius: 10px;
    }
}