:root {
  --bg: #f4f6f8;
  --card: #fff;
  --border: #d8dee4;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #0b5cab;
  --primary-hover: #094a8a;
  --danger: #b42318;
  --sidebar: #1e293b;
  --sidebar-text: #e2e8f0;
}

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

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #0b5cab, #1e293b);
}

.login-card {
  width: min(420px, 92vw);
  background: var(--card);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(0,0,0,.2);
}

.login-header h1 { margin: 0 0 .25rem; font-size: 1.4rem; }
.login-header p { margin: 0 0 1.5rem; color: var(--muted); }
.login-card label { display: block; margin-bottom: 1rem; font-size: .9rem; }
.login-card input,
.form-grid input,
.form-fields input {
  width: 100%;
  margin-top: .35rem;
  padding: .65rem .75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.form-grid select,
.form-fields select,
.login-card select {
  width: 100%;
  margin-top: .35rem;
  padding: .65rem .75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}
.login-card button, .btn {
  border: 0;
  border-radius: 8px;
  padding: .55rem .9rem;
  cursor: pointer;
  background: #e5e7eb;
}
.login-card button[type="submit"], .btn.primary {
  width: 100%;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}
.login-card button[type="submit"]:hover, .btn.primary:hover { background: var(--primary-hover); }
.login-card footer { margin-top: 1.5rem; text-align: center; color: var(--muted); font-size: .85rem; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .75rem 1rem;
  background: var(--sidebar);
  color: var(--sidebar-text);
}
.topbar-right { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.topbar .btn { background: rgba(255,255,255,.12); color: #fff; }
.topbar .btn.danger { background: var(--danger); }

.layout { display: grid; grid-template-columns: 260px 1fr; min-height: calc(100vh - 52px); }
.sidebar {
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 1rem;
  overflow: auto;
}
.sidebar input {
  width: 100%;
  padding: .5rem .65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1rem;
}
.nav-group h3 {
  margin: 1rem 0 .35rem;
  font-size: .75rem;
  text-transform: uppercase;
  color: var(--muted);
}
.nav-item {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: .45rem .5rem;
  border-radius: 6px;
  cursor: pointer;
}
.nav-item:hover, .nav-item.active { background: #e8f0fa; color: var(--primary); }

.content { padding: 1rem 1.25rem; overflow: auto; }
.welcome { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.5rem; }
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.panel-actions { display: flex; gap: .5rem; }
.panel-actions input { padding: .45rem .6rem; border: 1px solid var(--border); border-radius: 8px; }

.table-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: auto;
}
table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { border-bottom: 1px solid var(--border); padding: .5rem .6rem; text-align: left; vertical-align: top; }
th { background: #f8fafc; position: sticky; top: 0; }
.row-actions { white-space: nowrap; }
.row-actions button { margin-right: .25rem; font-size: .8rem; }
.row-actions .danger { color: var(--danger); }

.pagination {
  display: flex;
  gap: .75rem;
  align-items: center;
  margin-top: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}
.form-grid label { display: block; font-size: .9rem; }
.form-grid input, .form-grid select {
  width: 100%;
  margin-top: .35rem;
  padding: .5rem .6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.result-box {
  margin-top: 1rem;
  background: #0f172a;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 10px;
  min-height: 120px;
  white-space: pre-wrap;
}

dialog {
  border: 0;
  border-radius: 12px;
  padding: 1.25rem;
  width: min(640px, 92vw);
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
dialog form label {
  display: block;
  margin-bottom: .75rem;
  font-size: .9rem;
}
dialog input, dialog select {
  width: 100%;
  margin-top: .3rem;
  padding: .5rem .6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.modal-actions { display: flex; gap: .5rem; margin-top: 1rem; }

.error-msg { color: var(--danger); font-size: .9rem; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
}