.container.wide-container{max-width:1000px}.writeups-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;padding-bottom:2rem}.header-card{background:var(--card-bg);border-radius:12px;padding:2.5rem 1.3rem;padding-bottom:24px;margin-bottom:2rem;text-align:center;border:1px solid var(--border-color)}.header-card h1{font-size:2.5rem;margin-bottom:1.2rem;color:var(--primary-accent)}.grid-card-link{text-decoration:none!important;color:inherit;display:block}.grid-card{background:var(--card-bg);border-radius:12px;padding:1.5rem;height:100%;display:flex;flex-direction:column;box-shadow:0 4px 20px rgb(0 0 0 / 20%);border:1px solid var(--border-color);transition:transform .2s ease,border-color .2s ease}.grid-card:hover{transform:translateY(-5px);border-color:var(--primary-accent);box-shadow:0 8px 25px rgb(0 255 204 / 10%)}.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;font-size:.8rem;color:var(--text-muted)}.card-title{font-size:1.25rem;font-weight:700;margin:0 0 .8rem;line-height:1.3;color:var(--primary-accent);font-family:var(--font-mono)}.card-excerpt{font-size:.95rem;color:var(--text-main);line-height:1.5;margin-bottom:1.5rem;flex-grow:1}.tag-container-compact{display:flex;flex-wrap:wrap;gap:12px}.tag-pill{background:rgb(0 255 204 / 10%);color:var(--primary-accent);border:1px solid var(--primary-accent);font-size:.75rem;padding:4px 10px;border-radius:4px;font-family:var(--font-mono)}.filter-toolbar{margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border-color);display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:1.7rem}.filter-group{display:flex;align-items:center;flex:0 1 auto}.custom-select-wrapper{position:relative;user-select:none;width:200px;font-family:var(--font-mono)}.custom-select-trigger{display:flex;align-items:center;justify-content:space-between;padding:6px 15px;font-size:.85rem;font-weight:600;height:43px;color:var(--text-main);background:var(--bg-dark);border:1px solid var(--border-color);border-radius:8px;cursor:pointer;transition:border-color .2s}.custom-select-trigger:hover{border-color:var(--primary-accent)}.custom-options{position:absolute;top:110%;left:0;right:0;background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 10px 25px rgb(0 0 0 / 5%);z-index:100;display:none}.custom-select.open .custom-options{display:block}.custom-option{display:block;padding:10px 15px;color:var(--text-muted);cursor:pointer;transition:all .2s}.custom-option:hover{background:rgb(0 255 204 / 10%);color:var(--primary-accent)}.custom-option.selected{color:var(--primary-accent);font-weight:700}.diff-toggles{display:flex;gap:8px;background:var(--bg-dark);padding:6px;height:43px;border-radius:8px;border:1px solid var(--border-color)}.diff-btn{border:1px solid transparent;background:0 0;padding:6px 14px;border-radius:4px;font-size:.85rem;font-family:var(--font-mono);font-weight:600;color:var(--text-muted);cursor:pointer;transition:all .2s ease}.diff-btn:hover{color:var(--text-main)}.diff-btn.active{background:rgb(0 255 204 / 10%);border-color:var(--primary-accent);color:var(--primary-accent)}.diff-btn[data-value=easy].active{border-color:var(--diff-easy-text);color:var(--diff-easy-text)}.diff-btn[data-value=medium].active{border-color:var(--diff-med-text);color:var(--diff-med-text)}.diff-btn[data-value=hard].active{border-color:var(--diff-hard-text);color:var(--diff-hard-text)}@media (width <= 650px){.custom-select-trigger{justify-content:center}.custom-select-wrapper{width:265px}}