/* unified projects section */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 3.2rem;
}

.proj-category-head {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1.6rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.proj-category-head i {
    color: var(--blue);
    font-size: 1.8rem;
}

.proj-category-head h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-0);
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.proj-featured,
.proj-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.6rem;
}

.proj-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.proj-card:hover {
    border-color: var(--border-active);
    transform: translateY(-3px);
    box-shadow: var(--blue-glow);
}

.proj-card--featured {
    background: linear-gradient(145deg, var(--bg-1) 0%, var(--bg-2) 100%);
    border-color: rgba(110, 168, 254, 0.12);
}

.proj-card-img {
    width: 100%;
    height: 160px;
    overflow: hidden;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
}

.proj-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s var(--ease);
}

.proj-card:hover .proj-card-img img {
    transform: scale(1.04);
}

.proj-card-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.proj-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.4rem;
}

.proj-card-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-muted);
    border-radius: 8px;
    border: 1px solid rgba(110, 168, 254, 0.12);
}

.proj-card-icon i {
    font-size: 2rem;
    color: var(--blue);
}

.proj-card-badge {
    font-family: var(--mono);
    font-size: 1rem;
    color: var(--blue);
    background: var(--blue-muted);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.proj-card-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-0);
    margin-bottom: 0.8rem;
    transition: color 0.2s;
}

.proj-card:hover .proj-card-title {
    color: var(--blue);
}

.proj-card-desc {
    font-size: 1.25rem;
    color: var(--text-1);
    line-height: 1.6;
    margin-bottom: 1.4rem;
    flex: 1;
}

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

.proj-tag {
    font-size: 1rem;
    font-family: var(--mono);
    color: var(--text-2);
    background: var(--bg-2);
    border: 1px solid var(--border);
    padding: 0.25rem 0.7rem;
    border-radius: 4px;
    transition: border-color 0.2s, color 0.2s;
}

.proj-card:hover .proj-tag {
    border-color: var(--border-active);
    color: var(--text-1);
}

.proj-card-link {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: rgba(5, 5, 7, 0.7);
    border: 1px solid var(--border);
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.2s, transform 0.2s, border-color 0.2s;
    backdrop-filter: blur(4px);
}

.proj-card-link i {
    font-size: 1.4rem;
    color: var(--blue);
}

.proj-card:hover .proj-card-link {
    opacity: 1;
    transform: translateX(0);
    border-color: var(--border-active);
}

@media (max-width: 900px) {
    .proj-featured,
    .proj-list {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

@media (max-width: 640px) {
    .projects-grid {
        gap: 2.4rem;
    }

    .proj-featured,
    .proj-list {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .proj-card-img {
        height: 140px;
    }

    .proj-card-content {
        padding: 1.6rem;
    }

    .proj-card-title {
        font-size: 1.45rem;
    }

    .proj-card-desc {
        font-size: 1.15rem;
    }

    .proj-card-link {
        opacity: 1;
        transform: translateX(0);
    }
}

/* writeups section */
.wl-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.wl-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.6rem 2rem;
    border-bottom: 1px solid var(--border);
}

.wl-header h3 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-0);
}

.wl-header p {
    font-size: 1.2rem;
    color: var(--text-2);
    margin: 0;
}

.wl-count {
    font-family: var(--mono);
    font-size: 1.1rem;
    color: var(--text-2);
    padding: 0.4rem 1rem;
    background: var(--bg-2);
    border-radius: 4px;
}

.wl-count b { color: var(--blue); font-weight: 600; }

.wl-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.wl-column {
    padding: 1.6rem 2rem;
}

.wl-column + .wl-column {
    border-left: 1px solid var(--border);
}

.wl-column-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
}

.wl-column-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.wl-column-title-wrap i {
    color: var(--blue);
    font-size: 1.4rem;
}

.wl-column-title-wrap h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-0);
}

.wl-mini-count {
    font-family: var(--mono);
    font-size: 1rem;
    color: var(--blue);
    background: var(--blue-muted);
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
}

.wl-column-desc {
    font-size: 1.15rem;
    color: var(--text-2);
    margin-bottom: 1.2rem;
    line-height: 1.5;
}

.wl-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.wl-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    color: inherit;
    transition: background 0.15s;
}

.wl-item:hover {
    background: var(--blue-muted);
}

.wl-icon {
    width: 34px;
    height: 34px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.5rem;
}

.wl-icon img {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    object-fit: cover;
}

.wl-icon.ctf { background: rgba(239, 68, 68, 0.06); }
.wl-icon.dev { background: rgba(167, 139, 250, 0.06); }

.wl-body {
    flex: 1;
    min-width: 0;
}

.wl-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-0);
    transition: color 0.15s;
}

.wl-item:hover .wl-title {
    color: var(--blue);
}

.wl-desc {
    font-size: 1.1rem;
    color: var(--text-2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.wl-right {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
}

.wl-diff {
    font-family: var(--mono);
    font-size: 1rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
    text-transform: uppercase;
}

.wl-diff.easy { background: rgba(34, 197, 94, 0.08); color: #34d399; }
.wl-diff.medium { background: rgba(250, 204, 21, 0.08); color: #fbbf24; }
.wl-diff.hard { background: rgba(239, 68, 68, 0.08); color: #f87171; }

.wl-platform {
    font-size: 1rem;
    color: var(--text-2);
}

.wl-arrow {
    color: var(--blue);
    opacity: 0;
    transition: opacity 0.15s;
    font-size: 1.4rem;
}

.wl-item:hover .wl-arrow { opacity: 1; }

.wl-footer {
    display: flex;
    gap: 1rem;
    padding: 1.4rem 2rem;
    border-top: 1px solid var(--border);
}

.wl-footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--blue);
    padding: 0.6rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s, background 0.2s;
}

.wl-footer-link:hover {
    border-color: var(--border-active);
    background: var(--blue-muted);
}

@media (max-width: 640px) {
    .wl-split {
        grid-template-columns: 1fr;
    }

    .wl-column + .wl-column {
        border-left: none;
        border-top: 1px solid var(--border);
    }

    .wl-desc, .wl-platform { display: none; }

    .wl-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        padding: 1.2rem 1.4rem;
    }

    .wl-column { padding: 1.2rem 1.4rem; }
    .wl-footer { padding: 1.2rem 1.4rem; flex-wrap: wrap; }
}