/* 
 * Simple Readable Academic Theme
 */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Newsreader:opsz,wght@6..72,400;6..72,500;6..72,600&family=Jost:wght@400;500;600;700&family=Barlow+Semi+Condensed:wght@300;400;500;600&family=Sora:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --black: #1a1a1a;
    --text: #333;
    --gray: #555;
    --light: #888;
    --border: #ddd;
    --bg: #fff;
    --font-body: 'Nunito', sans-serif;
    --font-ui: 'Nunito', sans-serif;
    --max-width: 800px;
    --header-height: 70px;
}

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

html { font-size: 18px; }

body {
    font-family: var(--font-body);
    line-height: 1.9;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== HEADER ===== */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 70px;
    background: var(--bg);
    border-bottom: 2px solid var(--black);
    z-index: 1000;
}

.header-inner {
    max-width: 1000px;
    height: 100%;
    margin: 0 auto;
    padding: 0 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    font-family: 'Jost', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--black);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    transition: color 0.15s;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.site-logo:hover {
    color: var(--black);
}

.site-nav {
    display: flex;
    gap: 2rem;
}

.site-nav a {
    font-family: 'Barlow Semi Condensed', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: #999;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.4rem 0;
    transition: color 0.15s;
}

.site-nav a:hover {
    color: var(--black);
}

.site-nav a.active {
    color: var(--black);
}

/* ===== SCROLLBAR ===== */
html {
    overflow-y: scroll;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f5f5f5;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: #ccc #f5f5f5;
}

/* ===== MAIN ===== */
.site-main {
    flex: 1;
    padding: calc(70px + 3.5rem) 1.5rem 4rem;
}

.content-box,
.post-article {
    max-width: var(--max-width);
    margin: 0 auto;
}

.content-box::before {
    display: none;
}

/* ===== PAGE TITLE ===== */
.page-title {
    font-family: 'Jost', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 5rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* ===== TYPOGRAPHY ===== */
.box-content,
.post-content {
    font-family: var(--font-body);
    font-size: 1.1rem;
    line-height: 2;
}

.post-content {
    text-align: justify;
}

.box-content p,
.post-content p {
    margin-bottom: 1.75rem;
}

.box-content a:not(.post-card-link),
.post-content a {
    color: var(--light);
    text-decoration: underline;
    text-decoration-color: var(--border);
    text-underline-offset: 3px;
}

.box-content a:not(.post-card-link):hover,
.post-content a:hover {
    color: var(--black);
    text-decoration-color: var(--gray);
}

/* Remove all styling from post card links */
.post-card-link,
.post-card-link:hover,
.post-card-link:visited,
.post-card-link:active {
    text-decoration: none !important;
}

.post-card-link * {
    text-decoration: none !important;
}

/* ===== HOME HERO ===== */
.home-hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 4rem;
    margin-bottom: 6rem;
    padding: 2rem 0;
}

.home-info {
    flex: 1;
    padding-top: 1rem;
}

.home-info .home-title {
    font-family: 'Aharoni', 'Arial Black', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.home-title .alt-name {
    font-size: 1rem;
    font-weight: 400;
    color: var(--light);
    margin-left: 0.75rem;
}

.home-tagline {
    font-family: var(--font-ui);
    font-size: 1rem;
    font-weight: 400;
    color: var(--gray);
    line-height: 1.6;
    margin: 0;
    white-space: nowrap;
}

.home-photo {
    flex-shrink: 0;
    width: 220px;
}

.home-photo img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 50%;
}

@media (max-width: 600px) {
    .home-hero {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .home-info .home-title {
        font-size: 2.2rem;
    }
    
    .home-photo {
        order: -1;
        width: 160px;
    }
}

/* ===== HEADINGS ===== */
.home-title,
.post-title {
    font-family: var(--font-body);
    font-size: 2.5rem;
    font-weight: 400;
    line-height: 1.25;
    color: var(--black);
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.box-content h2 {
    font-family: 'Jost', sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--black);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.box-content h2:first-child {
    margin-top: 0;
}

.box-content h3 {
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 3.5rem;
    margin-bottom: 1rem;
}

.post-content h2 {
    font-family: var(--font-ui);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--black);
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.post-content h3 {
    font-family: var(--font-ui);
    font-size: 1rem;
    font-weight: 600;
    color: var(--black);
    margin-top: 2rem;
    margin-bottom: 0.5rem;
}

/* ===== POST PAGE ===== */
.post-main {
    max-width: 900px;
    margin: 0 auto;
    padding: calc(70px + 3rem) 2rem 4rem;
}

.back-button {
    display: inline-block;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.15s;
}

.back-button:hover {
    color: var(--black);
}

.post-article {
    max-width: 100%;
}

.post-header {
    text-align: center;
    margin-bottom: 5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}

.post-header .post-title {
    font-family: 'Sora', sans-serif;
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--black);
    margin: 0 0 1.5rem 0;
}

.post-header .post-meta {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.post-header .post-tags {
    margin-left: 0.5rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--border);
}

.post-subtitle {
    font-family: var(--font-ui);
    font-size: 1.15rem;
    color: var(--gray);
    margin-top: 1rem;
}

.post-content {
    font-family: var(--font-body);
    font-size: 1.1rem;
    line-height: 1.9;
}

.post-content p {
    margin-bottom: 1.75rem;
}

.post-content h2 {
    font-family: 'Jost', sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--black);
    margin-top: 3rem;
    margin-bottom: 1rem;
}

.post-content h3 {
    font-family: 'Jost', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--black);
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.post-content blockquote {
    margin: 2rem 0;
    padding: 1.5rem 2rem;
    background: #f9f9f9;
    border-left: 4px solid var(--black);
    font-style: italic;
    color: var(--gray);
}

.post-content blockquote p:last-child {
    margin-bottom: 0;
}

.post-content ul,
.post-content ol {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2rem auto;
}

.post-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 3rem 0;
}

/* Post footer */
.post-footer {
    margin-top: 4rem;
}

.post-end-mark {
    text-align: center;
    font-size: 1.5rem;
    color: var(--light);
    margin-bottom: 3rem;
}

.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.post-nav-link {
    text-decoration: none;
    padding: 1rem;
    border-radius: 8px;
    transition: background 0.15s;
}

.post-nav-link:hover {
    background: #f5f5f5;
}

.post-nav-link.prev {
    text-align: left;
}

.post-nav-link.next {
    text-align: right;
    grid-column: 2;
}

.post-nav-label {
    display: block;
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
}

.post-nav-title {
    display: block;
    font-family: var(--font-ui);
    font-size: 1rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 0.25rem;
}

.post-nav-date {
    display: block;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    color: var(--light);
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--black);
    color: var(--bg);
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--gray);
}

@media (max-width: 600px) {
    .post-main {
        padding: calc(70px + 1.5rem) 1rem 3rem;
    }
    
    .post-title {
        font-size: 1.8rem;
    }
    
    .post-nav {
        grid-template-columns: 1fr;
    }
    
    .post-nav-link.next {
        grid-column: 1;
    }
}

/* ===== POST META ===== */
.post-header {
    margin-bottom: 2rem;
}

.post-meta {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    color: var(--light);
    margin-bottom: 0.5rem;
}

/* ===== EDUCATION ===== */
.edu-entry {
    margin-bottom: 1.75rem;
}

.edu-entry span {
    display: block;
}

.edu-entry .edu-date {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    color: var(--light);
    margin-bottom: 0.25rem;
}

.edu-entry .edu-school {
    font-family: var(--font-ui);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 0.15rem;
}

.edu-entry .edu-degree {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text);
}

.edu-entry .edu-thesis {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-style: italic;
    color: var(--gray);
    margin-top: 0.15rem;
}

/* ===== BLOCKQUOTE ===== */
.post-content blockquote {
    margin: 1.75rem 0;
    padding-left: 1.25rem;
    border-left: 2px solid var(--border);
    font-style: italic;
    color: var(--gray);
}

/* ===== CODE ===== */
.post-content code {
    font-family: ui-monospace, 'SF Mono', Consolas, monospace;
    font-size: 0.85em;
    background: #f5f5f5;
    padding: 0.15rem 0.35rem;
    border-radius: 3px;
}

.post-content pre {
    background: #f5f5f5;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 4px;
    line-height: 1.5;
}

.post-content pre code {
    background: none;
    padding: 0;
}

/* ===== POST NAV ===== */
.post-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.post-nav-link {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--gray);
    text-decoration: none;
}

.post-nav-link:hover {
    color: var(--black);
}

.post-nav-link.next {
    margin-left: auto;
}

/* ===== POSTS LIST ===== */
.posts-controls {
    max-width: var(--max-width);
    margin: 0 auto 5rem;
}

.search-wrapper {
    position: relative;
    margin-bottom: 1rem;
}

.search-input {
    width: 100%;
    padding: 0.7rem 1rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    border: 2px solid var(--black);
    border-radius: 0;
    background: var(--bg);
}

.search-input:focus {
    outline: none;
}

.search-clear {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--light);
    cursor: pointer;
    opacity: 0;
}

.search-clear.visible { opacity: 1; }

.tags-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-btn {
    padding: 0.4rem 0.75rem;
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 600;
    border: 2px solid var(--black);
    border-radius: 0;
    background: var(--bg);
    color: var(--black);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.tag-btn:hover {
    background: var(--black);
    color: var(--bg);
}

.tag-btn.active {
    background: var(--black);
    color: var(--bg);
}

.post-list {
    max-width: var(--max-width);
    margin: 0 auto;
}

.post-preview {
    padding: 2.5rem 0;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}

.post-preview:hover {
    background: #fafafa;
}

.post-preview:last-child { border-bottom: none; }

.post-card-link {
    display: block;
    text-decoration: none;
}

.post-card-link .post-meta {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--light);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.post-card-link .post-tag {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--light);
    margin-left: 0.5rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--border);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.post-card-link .post-title {
    font-family: 'Sora', sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--black);
    margin: 0 0 1.25rem 0;
    line-height: 1.3;
    display: inline;
}

.post-card-link:hover .post-title {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.post-card-link .post-excerpt {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.8;
    margin: 0;
}

.no-results {
    text-align: center;
    color: var(--light);
    padding: 2rem;
}

/* ===== FOOTER ===== */
.site-footer {
    padding: 1.5rem 2.5rem;
    text-align: center;
    border-top: 2px solid var(--black);
    margin-top: auto;
}

.site-footer span {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray);
}

/* ===== FOOTNOTES ===== */
.footnotes {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}

.footnotes hr { display: none; }

/* ===== MOBILE ===== */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--black);
    transition: all 0.3s;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 640px) {
    html { font-size: 17px; }
    
    .header-inner {
        padding: 0 1rem;
        border-bottom: 2px solid var(--black);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .site-header {
        border-bottom: none;
    }
    
    .site-logo {
        gap: 0.5rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .site-nav {
        position: absolute;
        top: calc(100% - 2px);
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
        border-top: 2px solid var(--bg);
        border-bottom: 2px solid var(--black);
        max-height: 0;
        overflow: hidden;
        padding: 0 2rem;
        transition: max-height 0.3s ease, padding 0.3s ease;
        margin-top: -1px;
    }
    
    .site-nav.active {
        max-height: 300px;
        padding: 1.25rem 2rem 1.5rem;
    }
    
    .site-nav a {
        font-size: 1.1rem;
    }
    
    .site-main {
        padding: calc(70px + 2rem) 1rem 3rem;
    }
    
    .home-hero {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
        padding: 1rem 0;
        margin-bottom: 3rem;
    }
    
    .home-photo {
        order: -1;
        width: 140px;
    }
    
    .home-info {
        padding-top: 0;
    }
    
    .home-info .home-title {
        font-size: 2.2rem;
        margin-bottom: 1rem;
    }
    
    .home-tagline {
        white-space: normal;
        font-size: 0.95rem;
    }
    
    .box-content, .post-content {
        font-size: 1rem;
    }
}

/* ===== HIDE BOOTSTRAP ===== */
.header, #mainNav, .navbar, .top-section,
.bg-gradient-primary-to-secondary-light,
.bg-gradient-primary-to-secondary-gray,
.bg-bottom, footer.bg-bottom {
    display: none !important;
}