/* Sober Theme - Clean and polished old-style with left sidebar */

:root {
    --heading-base-size: 18px;
    --heading-scale-factor: 1.33;

    /* Sober color palette - muted, sophisticated tones */
    --sidebar-bg: #2c2c2c;
    --sidebar-text: #e8e8e8;
    --sidebar-accent: #b8860b;
    --content-bg: #fafafa;
    --content-text: #333;
    --border-color: #d0d0d0;
    --card-bg: #ffffff;
    --hover-bg: #f5f5f5;
    --muted-text: #666;
    --link-color: #8b4513;
    --code-bg: #f8f8f8;
    --blockquote-bg: #f9f7f4;
    --blockquote-border: #d4a574;
}

@media screen and (max-width: 768px) {
    :root {
        --heading-base-size: 16px;
        --heading-scale-factor: 1.25;
    }
}

@layer base {
    body {
        background: var(--content-bg);
        color: var(--content-text);
        display: grid;
        grid-template-columns: 250px 1fr;
        min-height: 100vh;
    }

    /* Responsive grid adjustments */
    @media (max-width: 1024px) {
        body {
            grid-template-columns: 220px 1fr;
        }
    }

    @media (max-width: 768px) {
        body {
            display: block;
        }
    }
}

@layer typography {
    main,
    article {
        grid-column: 2;
        padding: 2rem 3rem;
        max-width: 52rem;
        margin: 0 auto;
        width: 100%;

        > * {
            margin: 1rem 0;
        }

        @media (max-width: 1024px) {
            padding: 2rem;
        }

        @media (max-width: 768px) {
            grid-column: 1;
            grid-row: 2;
            padding: 1rem;
        }
    }
}

@layer component {
    /* Left Sidebar Header */
    header {
        grid-column: 1;
        background: var(--sidebar-bg);
        color: var(--sidebar-text);
        padding: 2rem 1.5rem;
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);

        display: flex;
        flex-direction: column;
        gap: 2rem;

        > .spacer {
            display: none;
        }

        > h1 {
            font-size: 1.75rem;
            font-weight: 700;
            margin: 0;
            padding-bottom: 1rem;
            border-bottom: 2px solid var(--sidebar-accent);
            text-align: center;
            letter-spacing: 0.05em;

            > a {
                color: var(--sidebar-text);
                text-decoration: none;
                transition: color 0.3s ease;

                &:hover {
                    color: var(--sidebar-accent);
                }
            }
        }

        > nav {
            display: flex;
            flex-direction: column;
            gap: 1rem;

            > .nav-item {
                > a {
                    display: block;
                    color: var(--sidebar-text);
                    text-decoration: none;
                    padding: 0.75rem 1rem;
                    border-radius: 0.5rem;
                    font-weight: 500;
                    font-size: 1rem;
                    transition: all 0.3s ease;
                    border: 1px solid transparent;
                    margin: 0.125rem 0;

                    font-weight: 600;

                    &:hover,
                    &:focus {
                        background: rgba(255, 255, 255, 0.05);
                        border-color: var(--sidebar-accent);
                        transform: translateY(-1px);
                        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
                        color: var(--sidebar-accent);
                    }
                }
            }
        }

        /* Hide hamburger elements on desktop */
        .hamburger-toggle {
            display: none;
        }

        .hamburger-icon {
            display: none;
        }

        /* Mobile responsive sidebar */
        @media (max-width: 1024px) {
            padding: 1.5rem 1rem;
        }

        @media (max-width: 768px) {
            grid-column: 1;
            grid-row: 1;
            position: sticky;
            top: 0;
            height: 60px;
            flex-direction: row;
            align-items: center;
            padding: 0 1rem;
            gap: 1rem;
            z-index: 1000;

            > h1 {
                font-size: 1.25rem;
                padding: 0;
                border: none;
                text-align: left;
            }

            /* Hide hamburger elements on larger screens */
            .hamburger-toggle {
                display: none;
            }

            .hamburger-icon {
                display: flex;
                flex-direction: column;
                cursor: pointer;
                padding: 0.5rem;
                gap: 0.25rem;
                margin-left: auto;

                span {
                    width: 1.5rem;
                    height: 0.125rem;
                    background-color: var(--sidebar-text);
                    transition: all 0.3s ease;
                    border-radius: 0.125rem;
                }
            }

            > nav {
                position: fixed;
                top: 60px;
                left: -100%;
                width: 80%;
                max-width: 300px;
                height: calc(100vh - 60px);
                background: var(--sidebar-bg);
                transition: left 0.3s ease;
                padding: 1rem;
                box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
            }

            /* Show navigation when checkbox is checked */
            .hamburger-toggle:checked ~ nav {
                left: 0;
            }

            /* Animate hamburger icon */
            .hamburger-toggle:checked + .hamburger-icon span:nth-child(1) {
                transform: rotate(45deg) translate(0.15rem, 0.375rem);
            }

            .hamburger-toggle:checked + .hamburger-icon span:nth-child(2) {
                opacity: 0;
            }

            .hamburger-toggle:checked + .hamburger-icon span:nth-child(3) {
                transform: rotate(-45deg) translate(0.15rem, -0.375rem);
            }

            /* Overlay */
            .hamburger-toggle:checked::before {
                content: '';
                position: fixed;
                top: 60px;
                left: 0;
                width: 100%;
                height: calc(100vh - 60px);
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
            }
        }
    }

    /* Typography and Content Styling */
    blockquote {
        padding: 1rem 1.5rem;
        border-left: 4px solid var(--blockquote-border);
        background: var(--blockquote-bg);
        font-style: italic;
        border-radius: 0 0.5rem 0.5rem 0;
        margin: 1.5rem 0;
        position: relative;

        &::before {
            content: '"';
            font-size: 3rem;
            color: var(--blockquote-border);
            position: absolute;
            top: -0.5rem;
            left: 0.5rem;
            font-family: Georgia, serif;
        }
    }

    a {
        color: var(--link-color);
        text-decoration: none;
        border-bottom: 1px solid transparent;
        transition: all 0.3s ease;

        &:hover,
        &:focus {
            border-bottom-color: var(--link-color);
            color: #654321;
        }
    }

    pre:not(:has(.math-inline, .math-display, .katex)),
    code {
        font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
        background: var(--code-bg) !important;
        border-radius: 0.25rem;
        font-size: 90%;
    }

    pre:not(:has(.math-inline, .math-display, .katex)) {
        padding: 1rem;
        line-height: 1.4;
        overflow-x: auto;
        box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
        border: 1px solid var(--border-color);
    }

    code {
        padding: 0.125rem 0.25rem;
    }

    /* Card Components */
    .card {
        display: grid;
        grid-auto-flow: row;
        gap: 1rem;

        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 0.5rem;
        padding: 1.5rem;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        transition: all 0.3s ease;

        .title {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--content-text);
        }

        .date {
            font-size: 0.875rem;
            color: var(--muted-text);
            font-style: italic;
        }

        .description {
            color: var(--content-text);
            line-height: 1.6;
        }

        &:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            border-color: var(--sidebar-accent);
        }
    }

    .card-list {
        display: grid;
        gap: 1rem;
    }

    /* Jumbotron */
    .jumbotron {
        height: 60vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
        background: linear-gradient(150deg, #f8f8f8 0%, #f0f0f0 100%);
        border-bottom: 4px solid var(--sidebar-accent);
        margin-bottom: 2rem;
        border-top-left-radius: 1rem;
        border-top-right-radius: 1rem;

        h1 {
            font-size: calc(var(--heading-base-size) * pow(var(--heading-scale-factor), 4));
            font-weight: 300;
            color: var(--sidebar-bg);
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        p {
            max-width: 45ch;
            font-size: 1.125rem;
            color: var(--muted-text);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            height: 40vh;
            padding: 0 1rem;
        }
    }

    /* Buttons */
    .button {
        display: inline-block;
        padding: 0.25rem 1rem;
        background: linear-gradient(135deg, var(--card-bg) 0%, #f8f8f8 100%);
        color: var(--sidebar-bg);
        border: 1px solid var(--border-color);
        border-radius: 0.5rem;
        text-decoration: none;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        transition: all 64ms ease-in;
        letter-spacing: 0.025em;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);

        &:hover,
        &:focus {
            background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
            color: var(--sidebar-bg);
            border-color: var(--sidebar-accent);
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
    }

    /* Tags */
    .tags {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .tag {
        display: inline-block;
        padding: 0rem 0.5rem;
        background: var(--hover-bg);
        color: var(--content-text);
        font-size: 0.875rem;
        font-weight: 500;
        text-decoration: none;
        border: 1px solid var(--border-color);
        border-radius: 2rem;
        transition: all 0.3s ease;

        &:hover,
        &:focus {
            background: var(--sidebar-accent);
            color: white;
            border-color: var(--sidebar-accent);
            transform: translateY(-1px);
        }
    }

    /* Tables */
    table {
        width: 100%;
        border-collapse: collapse;
        margin: 1.5rem 0;
        background: var(--card-bg);
        border-radius: 0.5rem;
        overflow: hidden;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    }

    th,
    td {
        padding: 0.75rem 1rem;
        text-align: left;
        border-bottom: 1px solid var(--border-color);
    }

    th {
        background: var(--hover-bg);
        font-weight: 600;
        color: var(--sidebar-bg);
    }

    tr:hover {
        background: var(--hover-bg);
    }

    /* Lists */
    ul,
    ol {
        padding-left: 1.5rem;
    }

    li {
        margin: 0.5rem 0;
    }

    /* Headings */
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        color: var(--sidebar-bg);
        font-weight: 600;
        line-height: 1.3;
        margin: 2rem 0 1rem 0;
    }

    h1 {
        font-size: calc(var(--heading-base-size) * pow(var(--heading-scale-factor), 4));
        border-bottom: 2px solid var(--sidebar-accent);
        padding-bottom: 0.5rem;
    }

    h2 {
        font-size: calc(var(--heading-base-size) * pow(var(--heading-scale-factor), 3));
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 0.25rem;
    }

    h3 {
        font-size: calc(var(--heading-base-size) * pow(var(--heading-scale-factor), 2));
    }

    h4 {
        font-size: calc(var(--heading-base-size) * var(--heading-scale-factor));
    }

    h5 {
        font-size: var(--heading-base-size);
    }

    h6 {
        font-size: calc(var(--heading-base-size) * 0.9);
        color: var(--muted-text);
    }
}