* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f4f7fa;
  --panel: #ffffff;
  --line: #d9e1e7;
  --text: #17222c;
  --muted: #627484;
  --brand: #1a6a59;
  --brand-soft: #e8f5f1;
  --accent: #195ea5;
  --accent-soft: #e9f2fb;
  --warn-soft: #fff0da;
  --danger: #aa3434;
  --danger-soft: #fdecec;
  --shadow: 0 14px 36px rgba(16, 28, 40, 0.08);
  --radius: 10px;
  --radius-lg: 18px;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  color: var(--text);
  background:
    radial-gradient(circle at top left, #e8f1ff 0, transparent 24%),
    linear-gradient(180deg, #f7fafc 0%, #eef3f7 100%);
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-shell {
  width: min(1060px, 100%);
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.login-hero {
  padding: 40px;
  background: linear-gradient(145deg, #173d6c 0%, #1a6a59 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}

.login-hero h1 { font-size: 38px; line-height: 1.04; margin-bottom: 12px; }
.login-hero p { color: rgba(255,255,255,.86); line-height: 1.7; max-width: 42ch; }

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.hero-card {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 14px;
  padding: 14px;
}

.hero-card strong { display: block; font-size: 22px; margin-bottom: 4px; }
.hero-card span { display: block; font-size: 12px; line-height: 1.55; color: rgba(255,255,255,.82); }

.login-panel {
  padding: 34px;
  background: var(--panel);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--brand));
  color: #fff;
  font-weight: 800;
}

.brand-row p { color: var(--muted); margin-top: 4px; }

.stack { display: flex; flex-direction: column; gap: 14px; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field span, .field label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--muted);
  text-transform: uppercase;
}

.field input,
.field select,
.field textarea {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: var(--radius);
  padding: 10px 12px;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(25,94,165,.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  padding: 10px 14px;
  cursor: pointer;
}

.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.success { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.danger { background: var(--danger-soft); border-color: #efc1c1; color: var(--danger); }
.btn.small { padding: 8px 12px; font-size: 12px; }
.btn.full { width: 100%; }

.alert {
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
}

.alert.success { background: var(--brand-soft); border-color: #bfe8d8; color: var(--brand); }
.alert.error { background: var(--danger-soft); border-color: #efc1c1; color: var(--danger); }

.login-note {
  margin-top: 16px;
  color: var(--muted);
  line-height: 1.6;
}

code {
  background: #eef3f6;
  padding: 2px 6px;
  border-radius: 6px;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

.sidebar {
  padding: 18px 14px;
  background: linear-gradient(180deg, #172a4d 0%, #2d1643 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand span {
  display: block;
  font-size: 12px;
  color: rgba(255,255,255,.72);
  margin-top: 4px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-link {
  padding: 11px 12px;
  border-radius: 12px;
  color: rgba(255,255,255,.84);
}

.nav-link:hover,
.nav-link.active {
  background: rgba(255,255,255,.12);
  color: #fff;
}

.sidebar-user {
  padding: 12px;
  border-radius: 14px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
}

.sidebar-user strong,
.sidebar-user span {
  display: block;
}

.sidebar-user span {
  font-size: 12px;
  margin-top: 4px;
  color: rgba(255,255,255,.74);
}

.main-panel {
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 4;
  padding: 16px 24px;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.topbar h1 { font-size: 22px; }
.topbar p { color: var(--muted); margin-top: 4px; }

.topbar-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.pill {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.pill.blue { background: var(--accent-soft); color: var(--accent); }
.pill.green { background: var(--brand-soft); color: var(--brand); }

.content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section {
  scroll-margin-top: 88px;
}

.section-head {
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.section-head p { color: var(--muted); }

.stats-grid,
.form-grid,
.two-col {
  display: grid;
  gap: 16px;
}

.stats-grid { grid-template-columns: repeat(4, 1fr); }
.form-grid { grid-template-columns: repeat(4, 1fr); }
.two-col { grid-template-columns: 1fr 1fr; }

.stat-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 18px;
}

.stat-card span {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
  margin-bottom: 8px;
}

.stat-card strong {
  display: block;
  font-size: 28px;
  margin-bottom: 4px;
}

.stat-card small { color: var(--muted); }

.panel {
  padding: 18px;
}

.panel h3 { margin-bottom: 14px; }

.upload-preview {
  min-height: 180px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #f8fbfd;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin: 16px 0;
}

.preview-placeholder {
  text-align: center;
  color: var(--muted);
  line-height: 1.6;
  padding: 24px;
}

.upload-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}

.hidden { display: none !important; }

.table-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 16px 0 12px;
}

.table-toolbar p {
  color: var(--muted);
  margin-top: 4px;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
}

table {
  width: 100%;
  min-width: 1120px;
  border-collapse: collapse;
}

th {
  background: #edf4f9;
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid #ebf0f4;
  text-align: left;
  font-size: 12px;
  white-space: nowrap;
}

td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid #ebf0f4;
  vertical-align: top;
}

#items-table td {
  padding: 0;
}

#items-table td input {
  width: 100%;
  padding: 11px 10px;
  border: none;
  background: transparent;
}

#items-table td input:focus {
  outline: none;
  background: #f3f9ff;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox input {
  width: auto;
}

.metric-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.metric-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8fbfd;
}

.metric-row small {
  display: block;
  color: var(--muted);
  margin-top: 4px;
}

.highlight-row {
  background: #f4fbf7;
}

@media (max-width: 1180px) {
  .stats-grid,
  .form-grid,
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .login-shell,
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    gap: 12px;
  }

  .sidebar-nav {
    flex-direction: row;
    overflow: auto;
  }
}

@media (max-width: 640px) {
  .stats-grid,
  .form-grid,
  .two-col,
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    padding: 14px;
    align-items: flex-start;
  }

  .content,
  .login-panel,
  .login-hero {
    padding: 18px;
  }
}