*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #0065BD;
  --primary-dark: #004A8C;
  --bg: #F0F2F5;
  --white: #fff;
  --border: #dce3ed;
  --text: #1a1a1a;
  --text-light: #555;
  --danger: #c0392b;
  --success: #27ae60;
  --radius: 7px;
  --shadow: 0 1px 4px rgba(0,0,0,0.08);
}

body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; font-size: 15px; }

/* Layout */
.admin-wrap { display: flex; min-height: 100vh; }
.admin-sidebar { width: 220px; background: var(--primary-dark); color: #fff; display: flex; flex-direction: column; flex-shrink: 0; position: fixed; height: 100vh; overflow-y: auto; }
.admin-main { margin-left: 220px; flex: 1; padding: 2rem; }

/* Sidebar */
.admin-sidebar .logo { padding: 1.25rem 1.1rem; border-bottom: 1px solid rgba(255,255,255,0.12); font-weight: 700; font-size: 0.95rem; line-height: 1.4; }
.admin-sidebar .logo small { display: block; font-weight: 400; font-size: 0.75rem; opacity: 0.7; margin-top: 0.15rem; }
.admin-nav { flex: 1; padding: 0.5rem 0; }
.admin-nav a { display: block; padding: 0.6rem 1.1rem; color: rgba(255,255,255,0.85); font-size: 0.88rem; text-decoration: none; transition: background 0.15s; }
.admin-nav a:hover, .admin-nav a.active { background: rgba(255,255,255,0.12); color: #fff; }
.admin-nav .nav-section { padding: 0.8rem 1.1rem 0.2rem; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; opacity: 0.5; }
.admin-sidebar .sidebar-foot { padding: 0.9rem 1.1rem; border-top: 1px solid rgba(255,255,255,0.12); font-size: 0.8rem; opacity: 0.7; }
.admin-sidebar .sidebar-foot a { color: rgba(255,255,255,0.8); }

/* Page header */
.page-title { font-size: 1.4rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 1.5rem; }

/* Cards / boxes */
.box { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.5rem; margin-bottom: 1.5rem; }
.box h2 { font-size: 1rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 1.2rem; padding-bottom: 0.6rem; border-bottom: 2px solid var(--primary); }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th { background: var(--primary); color: #fff; padding: 0.6rem 0.9rem; text-align: left; font-size: 0.8rem; white-space: nowrap; }
td { padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f7f9fc; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--text-light); margin-bottom: 0.3rem; }
.form-group input[type=text],
.form-group input[type=password],
.form-group textarea,
.form-group select { width: 100%; padding: 0.5rem 0.75rem; border: 1px solid var(--border); border-radius: 5px; font-size: 0.9rem; font-family: inherit; background: #fff; transition: border-color 0.15s; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 70px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.75rem; }

/* Buttons */
.btn { display: inline-block; padding: 0.5rem 1.1rem; border-radius: 5px; border: none; font-size: 0.88rem; font-weight: 600; cursor: pointer; text-decoration: none; transition: background 0.15s, opacity 0.15s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.78rem; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.85; }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-secondary:hover { background: #cdd5e0; }
.btn-success { background: var(--success); color: #fff; }

/* Alerts */
.alert { padding: 0.75rem 1rem; border-radius: 5px; margin-bottom: 1rem; font-size: 0.88rem; }
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--primary-dark); }
.login-box { background: var(--white); border-radius: var(--radius); padding: 2.5rem 2rem; width: 340px; box-shadow: 0 4px 24px rgba(0,0,0,0.18); }
.login-box h1 { font-size: 1.1rem; color: var(--primary-dark); margin-bottom: 0.25rem; }
.login-box p { font-size: 0.82rem; color: var(--text-light); margin-bottom: 1.5rem; }

/* Kurzy editor */
.sekce-block { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 1.25rem; overflow: hidden; }
.sekce-header { background: #f0f4f8; padding: 0.75rem 1rem; display: flex; align-items: center; gap: 0.75rem; border-bottom: 1px solid var(--border); }
.sekce-header strong { flex: 1; font-size: 0.9rem; }
.sekce-body { padding: 1rem; }
.kurz-item { display: grid; grid-template-columns: 1fr 1fr auto; gap: 0.75rem; align-items: start; padding: 0.75rem; background: #f7f9fc; border-radius: 5px; margin-bottom: 0.5rem; }
.kurz-item .kurz-fields { grid-column: 1 / 3; display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.add-kurz-btn { margin-top: 0.5rem; }

/* Drag handle (visual only) */
.handle { cursor: move; color: #aaa; padding: 0 0.25rem; font-size: 1.1rem; }

/* Dashboard grid */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1rem; }
.dash-card { background: var(--white); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); text-decoration: none; color: var(--text); display: block; border-top: 3px solid var(--primary); transition: box-shadow 0.15s; }
.dash-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.12); }
.dash-card .icon { font-size: 1.6rem; margin-bottom: 0.5rem; }
.dash-card strong { display: block; font-size: 0.95rem; color: var(--primary-dark); }
.dash-card span { font-size: 0.78rem; color: var(--text-light); }