:root {
  /* Paleta azul-tecnológica: fundo com leve matiz azul (não cinza neutro),
     acentos em azul/ciano para reforçar a identidade "tech" pedida. */
  --bg: #0a0f1c;
  --bg-elevated: #101828;
  --bg-card: #131c2e;
  --bg-card-hover: #16213570;
  --border: #263349;
  --border-soft: #1c2740;
  --text: #e8edf7;
  --text-muted: #8592ad;
  --accent: #3b82f6;
  --accent-2: #22d3ee;
  --accent-hover: #60a5fa;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 10px;
  --shadow-card: 0 1px 2px rgba(0,0,0,0.4), 0 0 0 1px rgba(59,130,246,0.03);
  --section-gap: 1.75rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 15% -10%, #132038 0%, transparent 60%),
    radial-gradient(900px 500px at 100% 0%, #0f223a 0%, transparent 55%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
}

::selection { background: rgba(59,130,246,0.35); }

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(16,24,40,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 1.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
  position: sticky;
  top: 0;
  z-index: 40;
}

.navbar .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: 0.01em;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
}
.navbar .brand::before { -webkit-text-fill-color: initial; }

.navbar nav { display: flex; gap: 0.15rem; flex-wrap: wrap; }

.navbar nav a, .navbar nav span {
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: background 0.15s ease, color 0.15s ease;
}

.navbar nav a:hover { background: var(--bg-card); color: var(--text); }
.navbar nav a.active {
  background: rgba(59,130,246,0.12);
  color: var(--accent-2);
  box-shadow: inset 0 0 0 1px rgba(59,130,246,0.25);
}

.navbar .user-info { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 0.85rem; align-items: center; }
.form-inline { display: inline; margin: 0; }
/* "Sair" é um botão (POST) mas com cara de link, igual aos outros itens do topo. */
.link-botao { background: none; border: 0; padding: 0; font: inherit; color: inherit; cursor: pointer; text-decoration: underline; }
.link-botao:hover { color: var(--text); }

.container { max-width: 1200px; margin: 0 auto; padding: 1.75rem 1.5rem 3rem; }

.container > h2:first-child { margin-top: 0; }

/* Agrupa blocos de uma tela em seções com respiro vertical consistente —
   sem isso, cards viravam uma parede única sem hierarquia visual. */
.section { margin-bottom: var(--section-gap); }
.section:last-child { margin-bottom: 0; }
.section > h2, .section > h3 { margin-top: 0; }

h2 { font-size: 1.4rem; margin: 0 0 1rem; }
h3 { font-size: 1.05rem; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.1rem 1.35rem;
  margin-bottom: var(--section-gap);
  transition: border-color 0.15s ease;
}
.card:last-child { margin-bottom: 0; }
.card h2, .card h3 { margin-top: 0; }

.grid {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: var(--section-gap);
}
.grid:last-child { margin-bottom: 0; }

/* Catálogo da loja pública (shop.js) — inspirado no card de anúncio do
   Mercado Livre: foto grande em fundo claro (fotos de produto costumam ser
   em fundo branco), título em destaque, preço "de/por" com selo de
   desconto, e ação sempre fixada no rodapé do card mesmo com descrições de
   tamanho variável (shop-card-footer com margin-top: auto). */
.shop-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.shop-card {
  padding: 0;
  margin-bottom: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.shop-card:hover { transform: translateY(-2px); border-color: var(--accent); }

.shop-img-box { position: relative; }
.shop-img-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #f4f5f7;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.shop-img { width: 100%; height: 100%; object-fit: contain; display: block; }
.shop-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8a92a1;
  font-size: 0.7rem;
  text-align: center;
}
.shop-badge-promo {
  position: absolute;
  top: 0.55rem;
  left: 0.55rem;
  background: var(--danger);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.22rem 0.5rem;
  border-radius: 4px;
}

.shop-card-body { padding: 0.85rem 0.9rem 1rem; display: flex; flex-direction: column; flex: 1; }
.shop-card-body h3 {
  font-size: 0.92rem;
  font-weight: 500;
  margin: 0 0 0.35rem;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.shop-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.shop-price { margin-bottom: 0.35rem; }
.shop-price-old { display: block; font-size: 0.76rem; color: var(--text-muted); text-decoration: line-through; }
.shop-price-row { display: flex; align-items: baseline; gap: 0.5rem; flex-wrap: wrap; }
.shop-price-now { font-size: 1.3rem; font-weight: 600; color: var(--text); }
.shop-price-off { font-size: 0.82rem; font-weight: 600; color: var(--success); }
.shop-fora-estoque { color: var(--danger); font-size: 0.78rem; margin: 0 0 0.4rem; }
.shop-card-footer { margin-top: auto; padding-top: 0.6rem; }

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1rem 1.15rem;
}
.stat .label { color: var(--text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }
.stat .value { font-size: 1.65rem; font-weight: 700; margin-top: 0.3rem; }
.stat.warning { border-left-color: var(--warning); }
.stat.warning .value { color: var(--warning); }
.stat.danger { border-left-color: var(--danger); }
.stat.danger .value { color: var(--danger); }
.stat.success { border-left-color: var(--success); }
.stat.success .value { color: var(--success); }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--border-soft); }
th { color: var(--text-muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:hover td { background: rgba(59,130,246,0.045); }

.table-wrap { overflow-x: auto; }

.badge {
  display: inline-block;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-success { background: rgba(34,197,94,0.14); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.14); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.14); color: var(--danger); }
.badge-muted { background: rgba(133,146,173,0.14); color: var(--text-muted); }

.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius);
  padding: 0.55rem 1.1rem;
  background: linear-gradient(135deg, var(--accent), #2563eb);
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: filter 0.15s ease, transform 0.1s ease;
}
.btn:hover { filter: brightness(1.12); }
.btn:active { transform: translateY(1px); }
.btn.secondary { background: var(--bg-elevated); color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { filter: none; background: var(--bg-card); border-color: var(--accent); }
.btn.danger { background: linear-gradient(135deg, #f87171, var(--danger)); }
.btn.small { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; filter: none; }

form.form-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.form-grid .full { grid-column: 1 / -1; }

label { display: block; font-size: 0.83rem; color: var(--text-muted); margin-bottom: 0.35rem; }
input, select, textarea {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.55rem 0.65rem;
  font-size: 0.9rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.18);
}

.flash { padding: 0.65rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: 0.9rem; }
.flash-danger { background: rgba(239,68,68,0.12); color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }
.flash-warning { background: rgba(245,158,11,0.12); color: #fcd34d; border: 1px solid rgba(245,158,11,0.3); }
.flash-success { background: rgba(34,197,94,0.12); color: #86efac; border: 1px solid rgba(34,197,94,0.3); }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-card { width: 100%; max-width: 360px; }
.login-card h2 {
  text-align: center;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

@media (max-width: 640px) {
  .navbar { flex-direction: column; align-items: flex-start; }
  .container { padding: 1.1rem 0.85rem 2.5rem; }
}