:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --border: #e2e4ea;
  --text: #1f2430;
  --muted: #6b7280;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 10px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---- Auth pages ---- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}
.auth-card h1 { margin: 0 0 4px; color: var(--primary); }
.auth-card .subtitle { color: var(--muted); margin-bottom: 20px; text-align: center; }

form label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 4px; color: var(--muted); }
form input[type=text], form input[type=email], form input[type=password] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
form input:focus { outline: none; border-color: var(--primary); }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #eef0ff; color: var(--primary); }
.btn-danger { background: #fee2e2; color: var(--danger); }
.btn-small { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; margin-top: 16px; }
.btn-icon { background: none; font-size: 18px; padding: 6px 8px; }

.alert { padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }
.alert-error { background: #fee2e2; color: var(--danger); }
.alert-success { background: #dcfce7; color: var(--success); }

.ojs-status { display: block; margin-top: 4px; font-size: 12px; color: var(--muted); }
.ojs-status-ok { color: var(--success); }
.ojs-status-warn { color: #b45309; }

/* ---- Navbar ---- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card-bg);
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.navbar-brand { font-weight: 700; color: var(--primary); text-decoration: none; font-size: 18px; }
.navbar-user { display: flex; align-items: center; gap: 12px; font-size: 14px; }

.container { max-width: 960px; margin: 24px auto; padding: 0 20px; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }

.group-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.group-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.group-card h3 { margin: 0 0 6px; }
.group-card-actions { display: flex; gap: 8px; margin-top: 10px; }
.muted { color: var(--muted); font-size: 13px; }
.empty-state { color: var(--muted); text-align: center; padding: 40px 0; grid-column: 1/-1; }

.form-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.invite-link-box { display: flex; gap: 8px; margin-top: 6px; }
.invite-link-box input { flex: 1; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; background: #fafafa; }
.inline-form { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.inline-form input { flex: 1; min-width: 150px; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }

.table { width: 100%; border-collapse: collapse; background: var(--card-bg); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { background: #fafafa; font-size: 12px; text-transform: uppercase; color: var(--muted); }

/* ---- App / Chat layout ---- */
.app-layout { display: flex; height: 100vh; }
.sidebar { width: 260px; background: var(--card-bg); border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.sidebar-header { padding: 16px; border-bottom: 1px solid var(--border); }
.back-link { font-size: 13px; color: var(--muted); text-decoration: none; }
.sidebar-header h3 { margin: 8px 0 0; font-size: 16px; }
.member-list { flex: 1; overflow-y: auto; padding: 8px; }
.member-list-label { font-size: 11px; text-transform: uppercase; color: var(--muted); padding: 12px 10px 4px; }
.member-item { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.member-item:hover { background: #f2f3fb; }
.member-item.active { background: #eef0ff; color: var(--primary); font-weight: 600; }
.member-item small { color: var(--muted); font-weight: 400; }
.member-icon { width: 26px; height: 26px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; }
.icon-general { background: #64748b; }

.chat-main { flex: 1; display: flex; flex-direction: column; }
.chat-header { padding: 16px 20px; border-bottom: 1px solid var(--border); background: var(--card-bg); }
.chat-header h3 { margin: 0; }
.chat-messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 12px; }

.msg { max-width: 60%; padding: 10px 14px; border-radius: 12px; background: #fff; border: 1px solid var(--border); }
.msg-mine { align-self: flex-end; background: #eef0ff; }
.msg-other { align-self: flex-start; }
.msg-sender { font-size: 12px; font-weight: 700; color: var(--primary); margin-bottom: 2px; }
.msg-text { font-size: 14px; white-space: pre-wrap; word-break: break-word; }
.msg-time { font-size: 10px; color: var(--muted); margin-top: 4px; }
.msg-image { max-width: 220px; border-radius: 8px; margin-top: 4px; display: block; }
.msg-file { display: inline-block; margin-top: 4px; font-size: 13px; color: var(--primary); text-decoration: none; }
.link-preview { display: flex; gap: 10px; align-items: center; margin-top: 4px; border: 1px solid var(--border); border-radius: 8px; padding: 8px; text-decoration: none; color: var(--text); background: #fafafa; }
.link-preview img { width: 60px; height: 60px; object-fit: cover; border-radius: 6px; }
.link-info b { display: block; font-size: 13px; }
.link-info small { color: var(--muted); word-break: break-all; }

.chat-input-area { display: flex; align-items: center; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--border); background: var(--card-bg); }
.chat-input-area input[type=text] { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 20px; font-size: 14px; }

@media (max-width: 768px) {
  .app-layout { flex-direction: column; height: auto; }
  .sidebar { width: 100%; max-height: 200px; }
  .msg { max-width: 85%; }
}