/* ============ Envanter Yönetim Sistemi — Stil ============ */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f1f5f9;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --muted: #64748b;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn: #d97706;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
}

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

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

.container { width: min(1200px, 95%); margin: 0 auto; }
.hidden { display: none !important; }
.center { text-align: center; }
.muted { color: var(--muted); font-size: .9em; }

/* ---- Topbar ---- */
.topbar {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .9rem 0;
  flex-wrap: wrap;
  gap: .5rem;
}
.brand { color: #fff; font-weight: 800; font-size: 1.15rem; text-decoration: none; }
.nav { display: flex; gap: .25rem; flex-wrap: wrap; }
.nav a {
  color: rgba(255,255,255,.85);
  text-decoration: none;
  padding: .45rem .9rem;
  border-radius: 6px;
  font-size: .92rem;
  transition: background .2s;
}
.nav a:hover { background: rgba(255,255,255,.15); color:#fff; }
.nav a.active { background: rgba(255,255,255,.22); color:#fff; font-weight:600; }

/* ---- Main ---- */
main.container { padding: 1.75rem 0 3rem; flex: 1; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 1.25rem; flex-wrap: wrap; gap: .75rem; }
.page-head h1 { font-size: 1.65rem; }
.page-actions { display: flex; gap: .5rem; }

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: .5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #fff;
  color: var(--text);
  font-size: .9rem;
  cursor: pointer;
  text-decoration: none;
  transition: all .15s;
}
.btn:hover { background: #f8fafc; box-shadow: 0 2px 6px rgba(0,0,0,.08); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: #fee2e2; color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fecaca; }
.btn-warn { background: var(--warn); color: #fff; border-color: var(--warn); }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:hover { background: #f8fafc; }
.btn-sm { padding: .28rem .55rem; font-size: .8rem; }
.actions { display: flex; gap: .3rem; }

/* ---- Cards ---- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}
.card h2 { font-size: 1.2rem; margin-bottom: 1rem; }
.card h3 { font-size: .95rem; color: var(--muted); margin-bottom: .4rem; text-transform: uppercase; letter-spacing: .04em; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }

/* ---- Stats ---- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat-grid.mini { grid-template-columns: repeat(2, 1fr); max-width: 420px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
}
.stat-card.danger { border-color: #fecaca; background: #fef2f2; }
.stat-icon { font-size: 2rem; }
.stat-value { font-size: 1.7rem; font-weight: 800; }
.stat-value.small { font-size: 1.2rem; }
.stat-label { color: var(--muted); font-size: .85rem; }
.detail-value { font-size: 1.6rem; font-weight: 800; }

/* ---- Tables ---- */
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th {
  text-align: left;
  padding: .7rem .6rem;
  background: #f8fafc;
  border-bottom: 2px solid var(--border);
  color: var(--muted);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.table td { padding: .7rem .6rem; border-bottom: 1px solid var(--border); }
.table tr:hover td { background: #fafbfc; }
.badge-err { color: var(--danger); font-weight: 700; }
.text-danger { color: var(--danger); font-weight: 700; }
.text-ok { color: var(--ok); font-weight: 700; }

/* ---- Tags ---- */
.tag {
  display: inline-block;
  padding: .15rem .6rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
}
.tag-in { background: #dcfce7; color: #15803d; }
.tag-out { background: #fee2e2; color: #b91c1c; }
.tag-ok { background: #dcfce7; color: #15803d; }
.tag-warn { background: #fef3c7; color: #b45309; }

/* ---- Banners & alerts ---- */
.low-stock-banner {
  background: #fef3c7;
  border: 1px solid #fcd34d;
  color: #92400e;
  padding: .8rem 1rem;
  border-radius: 8px;
  margin-bottom: 1.25rem;
  font-size: .95rem;
}
.alert-danger {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  padding: .8rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

/* ---- Forms ---- */
.form { display: block; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: .35rem; font-weight: 600; font-size: .9rem; }
.form-group input, .form-group select {
  width: 100%;
  padding: .6rem .8rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: .95rem;
  background: #fff;
}
.form-group input:focus, .form-group select:focus {
  outline: 2px solid var(--primary);
  border-color: transparent;
}
.form-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.hint { font-size: .8rem; color: var(--muted); }
.form-actions { display: flex; gap: .6rem; margin-top: 1rem; }
.form-card { max-width: 640px; }

/* ---- Filter bar ---- */
.filter-bar { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.filter-bar input, .filter-bar select {
  padding: .55rem .8rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: .9rem;
  min-width: 160px;
}
.filter-bar input[type="text"] { flex: 1; min-width: 200px; }
.report-filter input[type="date"] { min-width: 150px; }

/* ---- Stock ops ---- */
.stock-ops { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.stock-ops h2 { margin: 0; }
.stock-op-buttons { display: flex; gap: .6rem; }

/* ---- Modal ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.75rem;
  width: min(420px, 92%);
  box-shadow: 0 20px 50px rgba(0,0,0,.3);
}
.modal h2 { margin-bottom: 1rem; }

/* ---- Footer ---- */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 1.1rem 0;
  font-size: .85rem;
  text-align: center;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .grid-2, .grid-3, .form-row { grid-template-columns: 1fr; }
  .page-head { flex-direction: column; align-items: flex-start; }
}