:root {
  --accent: #0078d4;
  --accent-hover: #106ebe;
  --accent-pressed: #005a9e;
  --bg: #f3f3f3;
  --surface: rgba(255, 255, 255, 0.75);
  --surface-solid: #ffffff;
  --text: #1b1b1b;
  --text-secondary: #5d5d5d;
  --border: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
  --sidebar-bg: rgba(243, 243, 243, 0.9);
  --danger: #c42b1c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #202020;
    --surface: rgba(45, 45, 45, 0.75);
    --surface-solid: #2b2b2b;
    --text: #f3f3f3;
    --text-secondary: #c5c5c5;
    --border: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --sidebar-bg: rgba(32, 32, 32, 0.9);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

.win-body {
  font-family: "Segoe UI Variable", "Segoe UI", -apple-system, "Noto Sans Bengali", "Noto Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

/* ---------- Login screen ---------- */

.login-body {
  background: linear-gradient(135deg, #0f6cbd 0%, #2b88d8 45%, #57c4e5 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-wrap {
  width: 100%;
  max-width: 380px;
  padding: 24px;
}

.login-card {
  background: var(--surface-solid);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 40px 32px;
  text-align: center;
}

.login-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.login-title {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}

.login-sub {
  color: var(--text-secondary);
  font-size: 13px;
  margin: 0 0 24px;
}

.login-form {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.login-error {
  background: rgba(196, 43, 28, 0.1);
  color: var(--danger);
  border: 1px solid rgba(196, 43, 28, 0.3);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: left;
}

.login-btn {
  margin-top: 16px;
  width: 100%;
}

/* ---------- Shared controls ---------- */

.win-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 12px;
}

.win-input {
  font: inherit;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.win-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.win-btn {
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  padding: 8px 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface-solid);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.win-btn:hover { background: var(--bg); }

.win-btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.win-btn-accent:hover { background: var(--accent-hover); }
.win-btn-accent:active { background: var(--accent-pressed); }

.win-btn-small {
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
}

/* ---------- App shell ---------- */

.shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  padding: 8px 10px 20px;
}

.brand-icon {
  display: inline-flex;
  color: var(--accent);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 2px;
}

.nav-item svg { flex-shrink: 0; color: var(--text-secondary); }
.nav-item.active svg, .nav-item:hover svg { color: currentColor; }

.nav-item:hover { background: var(--border); }

.nav-item.active {
  background: rgba(0, 120, 212, 0.12);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-spacer { flex: 1; }

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-name {
  font-size: 13px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item.signout { color: var(--danger); }

.content {
  flex: 1;
  padding: 32px 40px;
  max-width: 1200px;
}

.page-title {
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 24px;
}

.section-title {
  font-size: 16px;
  font-weight: 600;
  margin: 32px 0 16px;
}

.stat-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.stat-tile {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  padding: 20px 24px;
  min-width: 160px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.post-card {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.post-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--bg);
}

.post-thumb-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 12px;
}

.post-body {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.post-name {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-meta {
  font-size: 12px;
  color: var(--text-secondary);
}

.empty-state {
  color: var(--text-secondary);
  font-size: 14px;
}

/* ---------- Categories / Mapping pages ---------- */

.page-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-header-row .page-title { margin: 0; }

.flash {
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 20px;
  border: 1px solid transparent;
}

.flash-success {
  background: rgba(16, 124, 16, 0.1);
  color: #107c10;
  border-color: rgba(16, 124, 16, 0.3);
}

.flash-error {
  background: rgba(196, 43, 28, 0.1);
  color: var(--danger);
  border-color: rgba(196, 43, 28, 0.3);
}

.cat-group {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
}

.cat-group-title {
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.cat-shopbase-id {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 12px;
}

.cat-sub-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.cat-chip {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--text-secondary);
}

.form-card {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  padding: 24px;
  max-width: 780px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.win-select {
  font: inherit;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.win-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.win-table th, .win-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.win-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--bg);
}

.win-table tr:last-child td { border-bottom: none; }