:root {
    --primary: #006a4e;      /* বাংলাদেশ সবুজ */
    --accent: #f42a41;       /* লাল বৃত্ত ভাব */
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hind Siliguri", sans-serif; }
body { background-color: var(--bg); color: var(--text); line-height: 1.6; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 1rem; }

/* Navbar */
.navbar { background: var(--card); border-bottom: 1px solid var(--border); padding: 0.8rem 0; position: sticky; top: 0; z-index: 10; }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.3rem; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.btn-primary { background: var(--primary); color: #fff; border: none; padding: 0.6rem 1.2rem; border-radius: 6px; cursor: pointer; font-weight: 600; }
.btn-primary:hover { opacity: 0.9; }

/* Grid Layout */
.main-content { display: grid; grid-template-columns: 240px 1fr; gap: 2rem; margin-top: 1.5rem; }
.sidebar { background: var(--card); padding: 1.2rem; border-radius: 8px; border: 1px solid var(--border); height: fit-content; }
.group-nav { list-style: none; margin-top: 0.8rem; }
.group-nav li a { display: block; padding: 0.5rem 0.8rem; color: var(--muted); text-decoration: none; border-radius: 4px; margin-bottom: 4px; }
.group-nav li a:hover, .group-nav li a.active { background: #e6f3ef; color: var(--primary); font-weight: 600; }

/* Feed */
.feed-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.sort-controls { display: flex; gap: 8px; }
.sort-btn { background: var(--card); border: 1px solid var(--border); padding: 0.4rem 0.8rem; border-radius: 4px; cursor: pointer; }
.sort-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Post Card */
.post-card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1.2rem; margin-bottom: 1rem; display: flex; gap: 1rem; }
.vote-panel { display: flex; flex-direction: column; align-items: center; justify-content: flex-start; min-width: 45px; }
.vote-btn { background: none; border: 1px solid var(--border); width: 34px; height: 34px; border-radius: 50%; cursor: pointer; font-size: 1rem; }
.vote-btn:hover { background: #f1f5f9; }
.vote-score { font-weight: bold; margin: 6px 0; color: var(--primary); }
.post-details { flex-grow: 1; }
.post-badge { background: #e2e8f0; font-size: 0.75rem; padding: 2px 8px; border-radius: 12px; margin-right: 8px; font-weight: 600; }
.post-title { font-size: 1.15rem; margin: 6px 0; color: var(--text); }
.post-desc { color: #475569; font-size: 0.95rem; margin-bottom: 8px; }
.post-meta { font-size: 0.8rem; color: var(--muted); }

/* Modal */
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); align-items: center; justify-content: center; z-index: 100; }
.modal-content { background: var(--card); padding: 2rem; border-radius: 8px; width: 90%; max-width: 550px; position: relative; }
.close-btn { position: absolute; right: 1.2rem; top: 1rem; font-size: 1.5rem; cursor: pointer; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 4px; font-weight: 600; font-size: 0.9rem; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.6rem; border: 1px solid var(--border); border-radius: 6px; }
.full-width { width: 100%; }

@media (max-width: 768px) {
    .main-content { grid-template-columns: 1fr; }
    .sidebar { display: none; }
}