:root {
    /* Soft Dark Architectural Palette - Slate Blue Hue */
    --bg: #0a0f16;
    --panel-bg: #11161d;
    --fg: #e2e8f0;
    --muted: #64748b;
    --border: #1e293b;
    --accent: #94a3b8; /* Soft, muted cool slate */
    --hover-bg: #161e2a;
    
    /* Monospace purely */
    --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

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

html, body {
    height: 100vh;
    overflow: hidden;
}

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: var(--font-mono);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 1rem;
}

/* Reading Progress */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background-color: var(--cyan);
    width: 0%;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease, width 0.1s linear;
}
.reading-progress-bar.visible {
    opacity: 1;
}

/* Search Input */
.search-input {
    width: 100%;
    background-color: var(--bg);
    border: 1px solid var(--border);
    color: var(--fg);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.2);
}

.search-input::placeholder {
    color: var(--muted);
}

/* 
 * ARCHITECTURAL GRID 
 * Structured panels with soft spacing and rounded corners.
 */
.site-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    min-height: calc(100vh - 2rem);
    max-width: 1600px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .site-grid {
        grid-template-columns: 350px 1fr;
        grid-template-rows: auto 1fr;
    }
}

/* Common Panel Styling */
.panel {
    background-color: var(--panel-bg);
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 16px;
}

@media (min-width: 1024px) {
    .panel {
        padding: 3rem;
    }
}

/* Header (Spans full width) */
.header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 1024px) {
    .header {
        grid-column: 1 / -1;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 2rem 3rem;
    }
}

.header-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.header-meta {
    color: var(--muted);
    font-size: 0.9rem;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    display: inline-block;
}

/* Sidebar */
.sidebar {
    position: relative;
}

.sidebar-sticky {
    position: sticky;
    top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.bio-block p {
    font-size: 1.05rem;
    color: var(--muted);
    line-height: 1.7;
}

.nav-heading {
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    text-decoration: none;
    color: var(--fg);
    padding: 0.75rem 1rem;
    border: 1px solid transparent;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-item span {
    color: var(--muted);
    font-size: 0.85rem;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--hover-bg);
    border-color: var(--border);
    color: var(--accent);
}

.socials {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.social-link {
    text-decoration: none;
    color: var(--muted);
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: color 0.2s ease, background-color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.social-link:hover {
    color: var(--fg);
    background-color: var(--hover-bg);
}

.x-link svg {
    fill: currentColor;
}

/* Main Content */
.main {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.main::-webkit-scrollbar {
    width: 6px;
}
.main::-webkit-scrollbar-track {
    background: transparent;
}
.main::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 10px;
}

.section-title {
    font-size: 0.9rem;
    color: var(--accent);
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    letter-spacing: 0.05em;
}

/* Blog Entries (Cards) */
.feed-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.post-entry {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.post-entry.hidden {
    display: none;
}

.post-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem;
    background-color: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
    cursor: pointer;
    text-align: left;
}

@media (min-width: 768px) {
    .post-card {
        flex-direction: column;
        gap: 1.5rem;
        align-items: flex-start;
    }
}

.post-card:not(.expanded):hover {
    background-color: var(--hover-bg);
    border-color: var(--muted);
    transform: translateY(-2px);
}

.post-card.expanded {
    background-color: var(--bg);
    border-color: var(--accent);
    cursor: default;
}

.post-meta {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    color: var(--muted);
    font-size: 0.85rem;
}

@media (min-width: 768px) {
    .post-meta {
        flex-direction: row;
        justify-content: space-between;
        min-width: 100%;
        max-width: 100%;
    }
}

.post-tag {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    color: var(--accent);
}

.post-content h3 {
    font-size: 1.4rem;
    font-weight: normal;
    color: var(--fg);
    margin-bottom: 0.75rem;
    transition: color 0.2s ease;
}

.post-card:not(.expanded):hover .post-content h3 {
    color: var(--fg);
}

.post-excerpt {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 0;
    max-width: 65ch;
    transition: margin-bottom 0.3s ease;
}

.post-card.expanded .post-excerpt {
    margin-bottom: 1.5rem;
}

/* Expansion Logic */
.post-body-wrapper {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.post-body {
    overflow: hidden;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.7;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.post-card.expanded .post-body-wrapper {
    grid-template-rows: 1fr;
}

.post-card.expanded .post-body {
    opacity: 1;
    transition: opacity 0.5s ease 0.3s; /* delay fade in until expanded slightly */
}

.post-body code {
    background-color: var(--border);
    padding: 0.1rem 0.3rem;
    color: var(--accent);
}

/* Button */
.toggle-read {
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--muted);
    letter-spacing: 0.05em;
    cursor: pointer;
    padding: 1rem 0 0 0;
    transition: color 0.2s ease;
    text-align: left;
    outline: none;
    width: 100%;
    margin-top: 1rem;
}

.post-card:hover .toggle-read, .toggle-read:hover {
    color: var(--accent);
}

.post-card.expanded .toggle-read {
    color: var(--accent);
    border-top: 1px solid var(--border);
    text-align: center;
}

.post-card.expanded .toggle-read:hover {
    color: var(--fg);
}accent);
    border-top: 1px solid var(--border);
    text-align: center;
}

.post-card.expanded .toggle-read:hover {
    color: var(--fg);
}ter;
}

.post-card.expanded .toggle-read:hover {
    color: var(--fg);
}.toggle-read:hover {
    color: var(--fg);
}accent);
    border-top: 1px solid var(--border);
    text-align: center;
}

.post-card.expanded .toggle-read:hover {
    color: var(--fg);
}ter;
}

.post-card.expanded .toggle-read:hover {
    color: var(--fg);
}