* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background: #1a1a1a;
    color: #dddddd;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: url("./background.jpg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-blend-mode: overlay;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.5rem 2rem;
    width: 100%;
    flex: 1;
    background-color: rgba(10, 10, 10, 0.75);
    backdrop-filter: blur(2px);
}

.top-nav {
    width: 100%;
    background: #111111;
    border-bottom: 1px solid #2a2a2a;
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.logo a {
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    letter-spacing: -0.02em;
}
.logo a:hover {
    opacity: 0.9;
}
nav {
    display: flex;
    gap: 0.125rem;
    background: #1f1f1f;
    padding: 0.125rem;
    margin-left: auto;
    border-radius: 4px;
}
.category-btn {
    background: transparent;
    border: none;
    color: #aaaaaa;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.5rem 1.2rem;
    cursor: pointer;
    border-radius: 4px;
}
.category-btn:hover {
    color: #ffffff;
    background: #2d2d2d;
}
.category-btn.active {
    color: #ffffff;
    background: #3d3d3d;
}
.nav-contact {
    color: #8ab4f8;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 0.5rem 0.8rem;
    background: #1f1f1f;
    margin-left: 0.5rem;
    border-radius: 4px;
}
.nav-contact:hover {
    background: #2d2d2d;
    color: #a8c9ff;
}

.bottom-left {
    position: fixed;
    bottom: 1rem;
    left: 1.5rem;
    font-size: 0.9rem;
    z-index: 10;
}
.bottom-left a {
    color: #4a4a4a;
    text-decoration: none;
    font-weight: 300;
}
.bottom-left a:hover {
    color: #aaaaaa;
}
.bottom-right {
    position: fixed;
    bottom: 1rem;
    right: 1.5rem;
    z-index: 10;
}
.github-avatar {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    border: 2px solid #2a2a2a;
}
.github-avatar:hover {
    border-color: #8ab4f8;
}

.category-section {
    display: none;
}
.category-section.active {
    display: block;
}
h2 {
    font-size: 2rem;
    font-weight: 400;
    border-bottom: 1px solid #2a2a2a;
    padding-bottom: 0.75rem;
    margin: 2rem 0 1.5rem 0;
    color: #f0f0f0;
    letter-spacing: -0.01em;
}
h2:first-of-type {
    margin-top: 1rem;
}

.subcategory-group {
    margin: 2rem 0 1.5rem 0;
    border-left: 4px solid #3d5a73;
    background: rgba(20, 20, 20, 0.6);
    padding: 1rem 1rem 0.5rem 1.5rem;
    border-radius: 0 8px 8px 0;
}
.subcategory-header {
    color: #cccccc;
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 1rem;
    display: inline-block;
    background: #1f2a2a;
    padding: 0.2rem 1rem;
    border-radius: 4px;
}
.subcategory-group .grid {
    margin-top: 0.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.2rem;
}
.card {
    background: #141414;
    padding: 1.2rem 1rem;
    border: 1px solid #222;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}
.card:hover {
    background: #1c1c1c;
}
.card.image-bg {
    background: transparent;
}
.card.image-bg::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: inherit;
    background-size: cover;
    background-position: center;
    opacity: 0.04;
    pointer-events: none;
    z-index: 0;
}
.card.image-bg > * {
    position: relative;
    z-index: 1;
    background-color: rgba(20,20,20,0.9);
    padding: 0.25rem;
    border-radius: 4px;
}
.card .title-with-image {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}
.card .title-with-image h3 {
    flex: 1;
    margin-bottom: 0;
}
.card .title-with-image .card-image-inline {
    max-height: 32px;
    max-width: 32px;
    width: auto;
    height: auto;
    margin-left: 0.5rem;
    border-radius: 4px;
    border: 1px solid #333;
}
.card .title-with-image .card-image-inline.large {
    max-height: 48px;
    max-width: 48px;
}
.card h3 {
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}
.card-description {
    color: #dddddd;
    font-size: 0.95rem;
    margin: 0.5rem 0 0.8rem 0;
    line-height: 1.4;
    background: rgba(0, 0, 0, 0.3);
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
}
/* Push links to bottom */
.card-links {
    display: flex;
    gap: 0.5rem;
    margin-top: auto;
}
.card-links a {
    flex: 1 1 0;
    background: #1e1e1e;
    color: #8ab4f8;
    text-decoration: none;
    padding: 0.7rem 0.2rem;
    text-align: center;
    border: 1px solid #3a3a3a;
    border-radius: 4px;
    font-size: 0.95rem;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.card-links a:hover {
    background: #2d2d2d;
    border-color: #8ab4f8;
    color: #a8c9ff;
}
.card-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.copyable-block {
    cursor: pointer;
    color: #8ab4f8;
    background: #1a1a1a;
    border: 1px solid #3a3a3a;
    border-radius: 4px;
    padding: 0.8rem 0.5rem;
    text-align: center;
    font-size: 1rem;
    transition: none;
    display: block;
    width: 100%;
}
.copyable-block:hover {
    background: #2a2a2a;
    border-color: #8ab4f8;
}
.copyable-block.copy-flash {
    background: #1e4a6f;
    color: #ffffff;
    border-color: #ffffff;
}
.download-link {
    color: #8ab4f8;
    font-size: 0.9rem;
    text-decoration: none;
    border: 1px solid #3a3a3a;
    padding: 0.3rem 0.6rem;
    display: inline-block;
    background: #1e1e1e;
    border-radius: 4px;
    text-align: center;
}
.download-link:hover {
    background: #2a2a2a;
    border-color: #8ab4f8;
}

.legacy-block {
    margin: 2rem 0;
    background: #0f0f0f;
    border: 1px solid #222;
    padding: 1.5rem;
    border-radius: 4px;
}
.legacy-block h3 {
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 1rem;
}
.legacy-lines a {
    display: block;
    color: #8ab4f8;
    text-decoration: none;
    padding: 0.3rem 0;
    font-size: 1.05rem;
    border-bottom: 1px solid #222;
}
.legacy-lines a:last-child {
    border-bottom: none;
}
.legacy-lines a:hover {
    background: #1a1a1a;
    padding-left: 0.5rem;
}

* {
    transition: none;
}