/* Global layout */
:root {
    color-scheme: dark;
    --bg: #0f1115;
    --panel: #171b22;
    --panel-strong: #202633;
    --card: #242a35;
    --card-raised: #2b3340;
    --border: #3b4657;
    --text: #f2f4f8;
    --muted: #aeb8c7;
    --accent: #7dd3fc;
    --accent-strong: #38bdf8;
    --focus: #facc15;
    --danger: #fb7185;
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(125, 211, 252, 0.11), transparent 28rem),
        linear-gradient(135deg, #0f1115 0%, #141922 48%, #101318 100%);
    color: var(--text);
    font-family: Courier, "Courier New", monospace;
    line-height: 1.55;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

a:hover {
    color: var(--accent-strong);
}

a:visited {
    color: #c4b5fd;
}

a:active {
    color: var(--danger);
}

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

p {
    margin: 0 0 12px;
}

h1,
h2,
h3,
h4 {
    line-height: 1.2;
}

h1 {
    margin: 0;
    font-size: clamp(1.7rem, 4vw, 3rem);
}

h2 {
    margin-top: 26px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

h3 {
    margin-top: 18px;
}

h4 {
    margin: 0;
    font-size: 1.08rem;
}

/* Navigation and filters */
#sidebar {
    position: sticky;
    top: 0;
    z-index: 10;
    width: 100%;
    padding: 14px clamp(14px, 4vw, 32px);
    background: rgba(15, 17, 21, 0.93);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

#nav-links,
#tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
}

#nav-links {
    align-items: center;
    margin-bottom: 12px;
}

#nav-links a,
#tag-list a {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(32, 38, 51, 0.72);
    color: var(--text);
    font-size: 0.9rem;
}

#nav-links a:hover,
#tag-list a:hover,
#tag-list a.active {
    border-color: rgba(125, 211, 252, 0.76);
    background: rgba(125, 211, 252, 0.14);
    color: var(--text);
}

#search {
    width: min(100%, 520px);
    min-height: 42px;
    margin: 0 0 12px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #0c0f14;
    color: var(--text);
    font: inherit;
}

#search:focus {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

.badge-box {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
}

.badge-box .badge p {
    margin: 0;
}

.badge-box .badge img {
    display: block;
    width: auto;
    max-width: 180px;
    height: 22px;
    border-radius: 0;
}

/* Page content */
#content {
    width: min(100% - 28px, 860px);
    margin: 0 auto;
    padding: 28px 0 72px;
}

#content.home-content {
    width: min(100% - 28px, 1240px);
}

#content > h1 {
    margin-bottom: 22px;
}

.home-content > h1::after {
    content: "A connected index of teaching, research, tools, writing, and experiments.";
    display: block;
    max-width: 760px;
    margin-top: 10px;
    color: var(--muted);
    font-size: clamp(0.95rem, 2vw, 1.08rem);
    font-weight: 400;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 18px;
    align-items: stretch;
}

#card-container:empty::before {
    content: "No cards match that filter.";
    display: block;
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--muted);
}

/* Cards */
.card {
    min-width: 0;
    min-height: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: linear-gradient(180deg, var(--card-raised), var(--card));
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.card:hover,
.card:focus-within {
    transform: translateY(-3px);
    border-color: rgba(125, 211, 252, 0.58);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.36);
}

.card-inner {
    min-height: 100%;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
}

.card-action {
    flex: 0 0 auto;
    padding: 5px 9px;
    border: 1px solid rgba(125, 211, 252, 0.55);
    border-radius: 999px;
    color: var(--text);
    background: rgba(125, 211, 252, 0.1);
    font-size: 0.82rem;
    white-space: nowrap;
}

.card-action:visited {
    color: var(--text);
}

.card img {
    width: 100%;
    max-height: 128px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    padding: 8px;
    border-radius: 8px;
    background: rgba(12, 15, 20, 0.42);
}

.card-text-container {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 10px;
}

.card-text {
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 6;
    line-clamp: 6;
    -webkit-box-orient: vertical;
    color: #e6ebf3;
}

.card.expanded .card-text {
    display: block;
    overflow: visible;
}

.expand-button {
    align-self: flex-start;
    min-height: 34px;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--accent);
    cursor: pointer;
    font: inherit;
    font-size: 0.88rem;
}

.expand-button:hover,
.expand-button:focus {
    color: var(--text);
    border-color: rgba(125, 211, 252, 0.7);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: auto;
}

.card-tag {
    padding: 3px 7px;
    border: 1px solid rgba(174, 184, 199, 0.26);
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.76rem;
}

.card.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Long-form and project pages */
.projects-wrap {
    width: min(100% - 28px, 1100px);
    margin: 0 auto;
    padding: 28px 0 72px;
}

.proj-section {
    margin: 24px 0;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: rgba(32, 38, 51, 0.72);
}

.proj-section h2 {
    margin: 0 0 12px;
}

.proj-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.proj-list li {
    padding: 10px 0;
    border-top: 1px solid rgba(174, 184, 199, 0.16);
}

.proj-list li:first-child {
    border-top: 0;
}

.muted,
.small {
    color: var(--muted);
}

pre {
    max-width: 100%;
    overflow-x: auto;
    padding: 12px 14px;
    border: 1px solid #2b3442;
    border-radius: 8px;
    background: #0b0d12;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.95em;
}

.callout {
    margin: 12px 0;
    padding: 12px 14px;
    border: 1px solid rgba(34, 211, 238, 0.28);
    border-radius: 8px;
    background: rgba(34, 211, 238, 0.1);
}

hr {
    border: none;
    border-top: 1px solid #2b3442;
    margin: 18px 0;
}

footer {
    padding: 20px;
    color: var(--muted);
    text-align: center;
}

#copyright {
    text-align: center;
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.28s ease both;
}

/* Responsive styles */
@media (min-width: 1060px) {
    body {
        display: grid;
        grid-template-columns: 300px minmax(0, 1fr);
        align-items: start;
    }

    #sidebar {
        width: 300px;
        height: 100vh;
        overflow-y: auto;
        border-right: 1px solid var(--border);
        border-bottom: 0;
    }

    #nav-links,
    #tag-list {
        display: grid;
        grid-template-columns: 1fr;
    }

    #nav-links a,
    #tag-list a {
        justify-content: flex-start;
        border-radius: 8px;
    }

    #content.home-content,
    .projects-wrap {
        width: min(100% - 48px, 1180px);
    }

    footer {
        grid-column: 2;
    }
}

@media (max-width: 720px) {
    #sidebar {
        padding: 12px;
    }

    #nav-links,
    #tag-list {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 4px;
        scroll-snap-type: x proximity;
    }

    #nav-links li,
    #tag-list li {
        flex: 0 0 auto;
        scroll-snap-align: start;
    }

    #content {
        width: min(100% - 20px, 1240px);
        padding-top: 22px;
    }

    .container {
        gap: 12px;
    }

    .card-inner {
        padding: 15px;
    }

    .card-header {
        flex-direction: column;
    }

    .card-action {
        align-self: flex-start;
    }

    .badge-box {
        display: none;
    }
}