/* ====== Design Tokens ====== */
:root {
    --bg:          #faf9f5;
    --bg-subtle:   #f3f2ec;
    --bg-surface:  #ece9e0;
    --text:        #111827;
    --text-muted:  #6b7280;
    --text-light:  #9ca3af;
    --accent:      #cc2200;
    --accent-dark: #a31a00;
    --border:      #e5e7eb;
}

/* Dark mode — manual override */
[data-theme="dark"] {
    --bg:          #141414;
    --bg-subtle:   #1e1e1e;
    --bg-surface:  #272727;
    --text:        #f0eded;
    --text-muted:  #9a9a9a;
    --text-light:  #666666;
    --accent:      #ff4433;
    --accent-dark: #e83322;
    --border:      rgba(255,255,255,0.1);
}

/* Dark mode — auto (system preference, no manual override) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg:          #141414;
        --bg-subtle:   #1e1e1e;
        --bg-surface:  #272727;
        --text:        #f0eded;
        --text-muted:  #9a9a9a;
        --text-light:  #666666;
        --accent:      #ff4433;
        --accent-dark: #e83322;
        --border:      rgba(255,255,255,0.1);
    }
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* Hide grain overlay and vignette */
#grain-overlay { display: none; }
body::after    { display: none; }

/* Show normal profile photo, hide thermal canvas */
#thermal-canvas { display: none !important; }
#profile-img    { display: block !important; filter: none !important; }

/* ====== Navigation ====== */
nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3rem;
    height: 56px;
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand { display: none; }

.nav-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle, .nav-sidebar-toggle {
    background: none;
    border: none;
    border-radius: 6px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.15s, background 0.15s;
    flex-shrink: 0;
}

.theme-toggle:hover, .nav-sidebar-toggle:hover {
    color: var(--text);
    background: var(--bg-subtle);
}

/* Hidden by default — JS shows it only on the docs page */
.nav-sidebar-toggle {
    display: none;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.15s;
}

nav a:hover { color: var(--text); }

nav a.active {
    color: var(--text);
    font-weight: 500;
}

/* ====== Page containers ====== */
.page-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 3rem 2rem 6rem;
    display: none;
    animation: fadeIn 0.25s ease;
    position: relative;
    z-index: 1;
}

.page-container.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ====== Home page ====== */
#home-page.active {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    max-width: 860px;
    margin: 0 auto;
    padding: 5rem 2rem 6rem;
}

.profile-section {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 3.5rem;
    margin-bottom: 0.5rem;
    width: 100%;
}

.profile-image {
    flex-shrink: 0;
    position: relative;
}

.profile-image canvas,
.profile-image img {
    width: 200px;
    height: 200px;
    border-radius: 12px;
    display: block;
    object-fit: cover;
    border: 1px solid var(--border);
}

.profile-image::after { display: none; }

.profile-info h1 {
    font-size: 2.6rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 1rem;
}

.profile-info p {
    margin: 0.25rem 0;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.info-block {
    margin-bottom: 1.25rem;
}

a.academic-link {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s;
}

a.academic-link:hover {
    color: var(--accent-dark);
    text-decoration: underline;
}

.highlight-tag {
    display: inline-block;
    background: rgba(204, 34, 0, 0.08);
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 500;
    padding: 0.15rem 0.6rem;
    border-radius: 4px;
}

.bottom-links {
    margin-top: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    font-size: 0.875rem;
    justify-content: center;
    align-items: center;
}

.bottom-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s;
    padding: 0 0.75rem;
}

.bottom-links a:hover {
    color: var(--accent);
}

/* ====== Publications collapsible on home page ====== */
.publications-collapsible {
    margin-top: 1.5rem;
    border: none;
    outline: none;
}

.publications-collapsible > summary {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-muted);
    padding: 0.25rem 0;
    margin-bottom: 0;
    text-align: left;
    list-style: none;
    border: none;
    outline: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
}

.publications-collapsible > summary::-webkit-details-marker {
    display: none;
}

.publications-collapsible > summary::marker {
    display: none;
    content: '';
}

.publications-collapsible > summary::before {
    content: '▶';
    font-size: 0.6rem;
    transition: transform 0.15s;
    flex-shrink: 0;
}

.publications-collapsible[open] > summary::before {
    transform: rotate(90deg);
}

.publications-collapsible[open] > summary {
    margin-bottom: 1.5rem;
}

.publications-content {
    padding-top: 0.25rem;
}

/* ====== Subpage styles ====== */
.subpage-title {
    font-weight: 600;
    font-size: 1.75rem;
    letter-spacing: -0.02em;
    margin-bottom: 1.75rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.list-item {
    margin-bottom: 0.25rem;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    transition: background 0.15s;
}

.list-item:hover {
    background: var(--bg-subtle);
}

.list-item-title {
    font-weight: 500;
    font-size: 0.975rem;
    margin-bottom: 0.25rem;
    color: var(--text);
}

.venue-tag {
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 500;
    margin-left: 0.4rem;
}

.list-item-title a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.15s;
}

.list-item-title a:hover {
    color: var(--accent);
}

.list-item-meta {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.resource-links {
    margin-top: 0.4rem;
    font-size: 0.875rem;
}

.resource-links a {
    color: var(--accent);
    text-decoration: none;
    margin-right: 1rem;
    transition: color 0.15s;
}

.resource-links a:hover {
    color: var(--accent-dark);
    text-decoration: underline;
}

.me {
    font-weight: 600;
    color: var(--text);
}

.tech-stack {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.tech-tag {
    font-size: 0.75rem;
    background: var(--bg-surface);
    color: var(--text-muted);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
}

details summary {
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-muted);
    outline: none;
    margin-bottom: 1rem;
    transition: color 0.15s;
    user-select: none;
}

details summary:hover {
    color: var(--accent);
}

hr.thermal-divider {
    border: 0;
    height: 1px;
    background: var(--border);
    margin: 2.5rem 0 2rem;
}

.details-inner {
    margin-top: 1.25rem;
    padding-left: 1rem;
    border-left: 2px solid var(--border);
}

/* ====== Docs welcome screen ====== */
.docs-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 60vh;
    padding: 3rem 0;
}

.docs-welcome h2 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.docs-welcome p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 420px;
}

.docs-welcome-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

.docs-welcome-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-decoration: none;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    transition: color 0.15s, background 0.15s;
    width: fit-content;
}

.docs-welcome-link:hover {
    color: var(--accent);
    background: var(--bg-subtle);
}

/* ====== Mika Doc ====== */
#docs-page {
    max-width: 1000px;
}

.docs-layout {
    display: flex;
    gap: 2.5rem;
    align-items: flex-start;
    margin-left: -160px;
}

.docs-sidebar {
    width: 200px;
    flex-shrink: 0;
    position: sticky;
    top: calc(56px + 2rem);
    max-height: calc(100vh - 56px - 4rem);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.docs-sidebar::-webkit-scrollbar { width: 4px; }
.docs-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.docs-sidebar::-webkit-scrollbar-track { background: transparent; }

.docs-sidebar a {
    display: block;
    padding: 0.3rem 0.6rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.875rem;
    line-height: 1.5;
    transition: color 0.15s, background 0.15s;
}

.docs-sidebar a:hover {
    color: var(--text);
    background: var(--bg-subtle);
}

.docs-sidebar a.active {
    color: var(--text);
    background: var(--bg-surface);
    font-weight: 500;
}

/* Collapsible groups */
.docs-sidebar details { margin-bottom: 0; }

.docs-sidebar details summary {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.4rem 0.6rem 0.2rem;
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: color 0.15s;
}

.docs-sidebar details summary::-webkit-details-marker { display: none; }

.docs-sidebar details summary::before {
    content: '▶';
    font-size: 0.6rem;
    transition: transform 0.15s;
    color: var(--text-light);
}

.docs-sidebar details[open] summary::before {
    transform: rotate(90deg);
}

.docs-sidebar details summary:hover { color: var(--text-muted); }

/* Docs toolbar */
#docs-toolbar {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 0.875rem;
    border-bottom: 1px solid var(--border);
    min-height: 1rem;
}

#docs-toolbar.welcome-mode {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
    min-height: 0;
}

.docs-toolbar-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    flex: 1;
}

.docs-layout.sidebar-collapsed .docs-sidebar { display: none; }
.docs-layout.sidebar-collapsed { margin-left: 0; }

.docs-toolbar-btn {
    font-family: inherit;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: none;
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.28rem 0.7rem;
    cursor: pointer;
    text-decoration: none;
    transition: color 0.15s, border-color 0.15s;
    display: inline-flex;
    align-items: center;
}

.docs-toolbar-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.docs-content {
    flex: 1;
    min-width: 0;
}

#docs-body h1, #docs-body h2, #docs-body h3 {
    color: var(--text);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 1.75rem 0 0.75rem;
}

#docs-body h1 { font-size: 1.75rem; }

#docs-body h2 {
    font-size: 1.25rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    margin-top: 2.5rem;
}

#docs-body h3 { font-size: 1.05rem; }

#docs-body p  { margin: 0.65rem 0; color: var(--text-muted); }

#docs-body code {
    background: var(--bg-surface);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-size: 0.875em;
    color: var(--text);
    border: 1px solid var(--border);
    font-family: 'SFMono-Regular', 'Consolas', monospace;
}

#docs-body pre {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin: 1rem 0;
}

#docs-body pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.875rem;
}

#docs-body a   { color: var(--accent); }
#docs-body a:hover { color: var(--accent-dark); text-decoration: underline; }

#docs-body hr {
    border: 0;
    height: 1px;
    background: var(--border);
    margin: 2rem 0;
}

#docs-body ul, #docs-body ol {
    padding-left: 1.5rem;
    margin: 0.65rem 0;
    color: var(--text-muted);
}

#docs-body li { margin: 0.3rem 0; }

#docs-body blockquote {
    border-left: 3px solid var(--border);
    padding-left: 1rem;
    color: var(--text-muted);
    margin: 1rem 0;
}

/* ====== Mobile sidebar overlay ====== */
.docs-sidebar-overlay {
    display: none;
}

/* ====== Mobile ====== */
@media (max-width: 768px) {
    /* Fix nav bar being cut off on right during horizontal scroll */
    body { padding-top: 56px; }

    nav {
        padding: 0 1.25rem;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }

    .nav-links { left: 1.25rem; }

    #home-page.active {
        padding: 2.5rem 1.25rem 5rem;
    }

    .profile-section {
        flex-direction: column !important;
        gap: 2rem;
        align-items: flex-start;
    }

    .profile-image canvas,
    .profile-image img {
        width: 140px;
        height: 140px;
    }

    .profile-info h1 { font-size: 1.8rem; }
    .profile-info p { font-size: 0.95rem; }

    .page-container { padding: 2rem 1.25rem 4rem; }

    .subpage-title { font-size: 1.5rem; }

    /* -- Docs layout on mobile -- */
    .docs-layout { flex-direction: column; margin-left: 0; }

    /* Overlay backdrop */
    .docs-sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 200;
    }

    .docs-sidebar-overlay.open {
        display: block;
    }

    /* Drawer sidebar */
    .docs-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 260px;
        height: 100vh;
        max-height: 100vh;
        background: var(--bg);
        z-index: 201;
        padding: 1.25rem;
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        border-right: 1px solid var(--border);
    }

    .docs-sidebar.open {
        transform: translateX(0);
    }

    /* -- Markdown content mobile fixes -- */
    #docs-body {
        overflow-x: hidden;
    }

    #docs-body pre {
        font-size: 0.8rem;
        padding: 0.75rem;
    }

    #docs-body img {
        max-width: 100%;
        height: auto;
    }

    #docs-body table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        max-width: 100%;
    }

    #docs-body .katex-display {
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        padding: 0.25rem 0;
    }

    #docs-body .katex {
        font-size: 0.9em;
    }

    #docs-body h1 { font-size: 1.4rem; }
    #docs-body h2 { font-size: 1.1rem; }
    #docs-body h3 { font-size: 0.95rem; }
    #docs-body p, #docs-body li { font-size: 0.93rem; }
    #docs-body code { font-size: 0.78rem; }
    #docs-body { word-break: break-word; overflow-wrap: break-word; }

    #docs-toolbar { flex-wrap: wrap; }
    .docs-toolbar-actions { flex-wrap: wrap; }
}

@media (max-width: 480px) {
    .nav-brand { font-size: 0.875rem; }
    .nav-links { left: 1.25rem; }
    .profile-info h1 { font-size: 1.5rem; }
    .bottom-links { gap: 0.875rem; }

    .docs-welcome h2 { font-size: 1.5rem; }
    .docs-welcome p { font-size: 0.9rem; }
}