/* General flex layout */
body {
    display: flex; /* Enable flex layout on body */
    flex-direction: column; /* Stack elements vertically */
    min-height: 100vh; /* Fill the visible height */
    margin: 0;
    font-family: sans-serif;
    background-color: #f4f4f4;
}

/* Main content container (Main + Aside, even if Aside is removed) */
.content-wrapper {
    display: flex;
    flex-direction: row; /* Lay out the main section and controls horizontally */
    flex-grow: 1; /* Let this container take the remaining space */
}

/* 1. Header Styles */
.layout-header {
    background: #1a1a1a;
    color: #fff;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: stretch;
    flex-direction: column;
    gap: 6px;
    /* Flex: no grow, no shrink, keep content size */
}
.layout-header .header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.layout-header .brand {
    display: flex;
    align-items: center;
}
.layout-header .logo { height: 40px; margin-right: 15px; }
.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: row;
    gap: 6px;
    width: 44px;
    height: 40px;
    border: 1px solid #333;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
}
.nav-toggle__bar {
    display: block;
    width: 2px;
    height: 18px;
    border-radius: 1px;
    background: #fff;
}
.nav-toggle:focus-visible {
    outline: 2px solid #f7931a;
    outline-offset: 2px;
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* 2. Nav Styles */
.layout-nav {
    background: #fff;
    border-bottom: 2px solid #ddd;
    /* Flex: no grow, no shrink, keep content size */
}
.layout-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex; /* Lay out buttons horizontally */
}
.nav-btn {
    background: none;
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1rem;
    white-space: nowrap; /* Prevent label wrapping */
    color: inherit;
    text-decoration: none;
    display: inline-block;
}
.nav-btn:hover, .nav-btn.active {
    background-color: #f7931a; /* Bitcoin orange */
    color: white;
}

@media (max-width: 960px) {
    .nav-toggle {
        display: inline-flex;
    }
    .layout-nav {
        border-bottom: none;
        border-top: none;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        pointer-events: none;
        transition: max-height 0.25s ease, opacity 0.2s ease;
    }
    body.nav-open .layout-nav {
        border-top: 2px solid #ddd;
        max-height: 480px;
        opacity: 1;
        pointer-events: auto;
    }
    .layout-nav ul {
        flex-direction: column;
        padding: 6px 0;
    }
    .layout-nav li {
        border-top: 1px solid #eee;
    }
    .nav-btn {
        width: 100%;
        text-align: left;
        padding: 12px 16px;
        white-space: normal;
    }
}

@media (max-width: 600px) {
    .layout-nav ul {
        padding: 4px 0;
    }
    .nav-btn {
        font-size: 0.95rem;
        padding: 11px 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .layout-nav {
        transition: none;
    }
}

/* 3. Section (Chart) Styles */
.layout-main {
    /* Fill available horizontal space inside content-wrapper */
    flex-grow: 1; 
    background: #fff;
    padding: 20px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

/* 4. Aside (Controls - removed from HTML, class kept for future) */
.layout-controls {
    /* If reintroduced, it can have a fixed width or take part of the space */
    /* Example: width: 300px; */
    padding: 20px;
    background: #fff;
    border-left: 1px solid #ddd;
}

/* 5. Footer Styles */
.layout-footer {
    text-align: center;
    padding: 10px;
    background: #e0e0e0;
    font-size: 0.8rem;
    margin-top: auto; /* Push the footer below all content */
}

/* Blog styles */
.blog-index .blog-header {
    margin-bottom: 20px;
}
.blog-index .blog-header h1 {
    margin: 0 0 6px;
}
.blog-index .blog-header p {
    margin: 0;
    color: #555;
}
.blog-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 16px;
}
.blog-card {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 16px;
    background: #fff;
}
.blog-card__title {
    color: #111;
    font-size: 1.1rem;
    text-decoration: none;
}
.blog-card__title:hover {
    text-decoration: underline;
}
.blog-card__meta {
    font-size: 0.85rem;
    color: #666;
    margin: 6px 0 10px;
}
.blog-card__excerpt {
    margin: 0;
    color: #333;
}
.blog-post__header h1 {
    margin-top: 0;
}
.blog-post__meta {
    color: #666;
    font-size: 0.9rem;
    margin: 6px 0 14px;
}
.blog-post__desc {
    color: #444;
    margin: 0 0 18px;
}
.blog-post__content {
    line-height: 1.6;
}
.blog-post__content h2 {
    margin-top: 1.6rem;
}
.blog-post__footer {
    margin-top: 24px;
}
.blog-post__footer a {
    color: #f7931a;
    text-decoration: none;
    font-weight: bold;
}
.blog-post__footer a:hover {
    text-decoration: underline;
}

.layout-header .last-update {
    font-size: 0.85rem;
    color: #e6e6e6;
    opacity: 0.85;
}
.layout-header .last-update time {
    font-variant-numeric: tabular-nums;
}