:root {
  --primary:      #1a7a5e;
  --primary-dk:   #0f5a44;
  --primary-lt:   #2aa87f;
  --accent:       #f0a500;
  --danger:       #dc3545;
  --success:      #28a745;
  --bg:           #f4f6f8;
  --card:         #ffffff;
  --border:       #dee2e6;
  --text:         #212529;
  --text-muted:   #6c757d;
  --shadow:       0 2px 12px rgba(0,0,0,.08);
  --radius:       10px;
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
  background: var(--primary-dk);
  color: #fff;
  height: 52px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.topbar .logo { font-size: 18px; font-weight: 700; letter-spacing: .5px; flex: 1; }
.topbar .logo span { color: var(--accent); }
.topbar .topbar-info { font-size: 12px; opacity: .85; }
.topbar .topbar-btns { display: flex; gap: 8px; }
.topbar .topbar-btns a,
.topbar .topbar-btns button {
  background: rgba(255,255,255,.15);
  border: none; color: #fff; cursor: pointer;
  padding: 6px 12px; border-radius: 6px; font-size: 13px;
  text-decoration: none; display: inline-flex; align-items: center; gap: 5px;
  transition: background .15s;
}
.topbar .topbar-btns a:hover,
.topbar .topbar-btns button:hover { background: rgba(255,255,255,.25); }

/* ── Login Page ──────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dk) 0%, var(--primary) 60%, var(--primary-lt) 100%);
}
.login-box {
  background: #fff;
  border-radius: 16px;
  padding: 40px 36px;
  width: 360px;
  box-shadow: 0 8px 40px rgba(0,0,0,.2);
}
.login-box .login-logo {
  text-align: center;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.login-box .login-logo img { display: block; margin: 0 auto 8px; }
.login-box .login-logo .icon { font-size: 48px; }
.login-box .login-logo h1 { font-size: 22px; color: var(--primary-dk); margin-top: 8px; }
.login-box .login-logo p  { font-size: 12px; color: var(--text-muted); }

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}
.card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

/* ── Scale Display ──────────────────────────────────────── */
.scale-display {
  background: #0d1117;
  border-radius: 12px;
  padding: 16px;
  border: 2px solid #30363d;
}
.scale-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.scale-row:last-child { margin-bottom: 0; }
.scale-label {
  color: #8b949e;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  width: 48px;
}
.scale-value {
  font-family: 'Courier New', monospace;
  font-size: 32px;
  font-weight: 700;
  color: #39d353;
  text-align: right;
  flex: 1;
  text-shadow: 0 0 12px rgba(57,211,83,.3);
}
.scale-value.net  { color: #58a6ff; text-shadow: 0 0 12px rgba(88,166,255,.3); }
.scale-value.tara { font-size: 18px; color: #e3b341; }
.scale-unit {
  color: #8b949e;
  font-size: 13px;
  margin-left: 6px;
  align-self: flex-end;
  padding-bottom: 4px;
}
.scale-connected { color: #39d353; }
.scale-disconnected { color: #f85149; }

/* ── Form Controls ──────────────────────────────────────── */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,122,94,.12);
}
.form-control-lg { padding: 10px 14px; font-size: 16px; }
input[type=number].form-control { -moz-appearance: textfield; }
input[type=number].form-control::-webkit-inner-spin-button { display: none; }

/* Autocomplete */
.autocomplete-wrap { position: relative; }
.autocomplete-list {
  position: absolute; top: 100%; left: 0; right: 0; z-index: 50;
  background: #fff; border: 1.5px solid var(--border); border-top: none;
  border-radius: 0 0 8px 8px; max-height: 220px; overflow-y: auto;
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
}
.autocomplete-item {
  padding: 9px 12px; cursor: pointer; font-size: 13px;
  border-bottom: 1px solid #f0f0f0; display: flex; gap: 8px;
}
.autocomplete-item:hover, .autocomplete-item.active { background: #e8f5ef; }
.autocomplete-code { font-size: 11px; color: var(--text-muted); white-space: nowrap; }
.autocomplete-empty { padding: 10px 12px; color: var(--text-muted); font-size: 13px; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 8px 16px; border: none; border-radius: 8px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all .15s; text-decoration: none; line-height: 1.4;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary   { background: var(--primary);  color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dk); }
.btn-success   { background: var(--success);  color: #fff; }
.btn-success:hover:not(:disabled) { background: #1e7e34; }
.btn-danger    { background: var(--danger);   color: #fff; }
.btn-danger:hover:not(:disabled) { background: #a71d2a; }
.btn-warning   { background: var(--accent);   color: #fff; }
.btn-warning:hover:not(:disabled) { background: #d48c00; }
.btn-outline   { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover:not(:disabled) { background: var(--primary); color: #fff; }
.btn-sm   { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn-lg   { padding: 12px 24px; font-size: 16px; border-radius: 10px; }
.btn-xl   { padding: 16px 28px; font-size: 20px; border-radius: 12px; width: 100%; min-height: 72px; }
.btn-full { width: 100%; }

/* Kategori butonları */
.kat-btn {
  width: 100%; min-height: 80px;
  border-radius: 12px; border: none; cursor: pointer;
  font-size: 18px; font-weight: 800;
  transition: all .12s; position: relative; overflow: hidden;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 4px; color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,.25);
}
.kat-btn:active { transform: scale(.96); }
.kat-btn .kat-stok  { font-size: 11px; opacity: .85; font-weight: 500; }

.kat-btn-1 { background: linear-gradient(135deg, #e67e22, #f39c12); }
.kat-btn-2 { background: linear-gradient(135deg, #2980b9, #3498db); }
.kat-btn-3 { background: linear-gradient(135deg, #27ae60, #2ecc71); }
.kat-btn-4 { background: linear-gradient(135deg, #8e44ad, #9b59b6); }
.kat-btn-5 { background: linear-gradient(135deg, #c0392b, #e74c3c); }
.kat-btn-6 { background: linear-gradient(135deg, #16a085, #1abc9c); }
.kat-btn-7 { background: linear-gradient(135deg, #2c3e50, #34495e); }
.kat-btn-8 { background: linear-gradient(135deg, #d35400, #e67e22); }

/* Numpad */
.numpad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.numpad .np-btn {
  background: #fff; border: 1.5px solid var(--border);
  border-radius: 10px; padding: 14px 8px;
  font-size: 20px; font-weight: 700; cursor: pointer;
  color: var(--text); transition: all .1s;
  box-shadow: 0 2px 6px rgba(0,0,0,.06);
}
.numpad .np-btn:hover { background: var(--bg); border-color: var(--primary); }
.numpad .np-btn:active { transform: scale(.95); background: #e8f5ef; }
.numpad .np-btn.np-clear { color: var(--danger); border-color: var(--danger); }
.numpad .np-btn.np-ok    { color: #fff; background: var(--primary); border-color: var(--primary); grid-column: span 2; }

/* ── Grid / Table ───────────────────────────────────────── */
.data-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.data-table th {
  background: var(--primary-dk); color: #fff;
  padding: 9px 10px; text-align: left; font-weight: 600;
  font-size: 12px; letter-spacing: .3px; white-space: nowrap;
  position: sticky; top: 0;
}
.data-table td {
  padding: 8px 10px; border-bottom: 1px solid #f0f0f0;
  vertical-align: middle; white-space: nowrap;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #f0f9f5; }
.data-table tr.aktarildi td { opacity: .55; }
.data-table .badge {
  display: inline-block; padding: 2px 8px; border-radius: 12px;
  font-size: 11px; font-weight: 700;
}
.badge-success { background: #d4edda; color: #155724; }
.badge-warning { background: #fff3cd; color: #856404; }
.badge-danger  { background: #f8d7da; color: #721c24; }
.badge-info    { background: #d1ecf1; color: #0c5460; }
.table-wrap { overflow-x: auto; overflow-y: auto; border-radius: 0 0 var(--radius) var(--radius); }

/* Özet satırı */
.summary-row {
  display: flex; gap: 12px; flex-wrap: wrap; padding: 10px 0;
}
.summary-item {
  background: #e8f5ef; border-radius: 8px; padding: 8px 14px;
  font-size: 13px; font-weight: 700; color: var(--primary-dk);
}
.summary-item span { color: var(--text-muted); font-weight: 400; margin-right: 4px; }

/* ── Tabs ───────────────────────────────────────────────── */
.tab-nav {
  display: flex; gap: 0; border-bottom: 2px solid var(--border);
  margin-bottom: 20px; overflow-x: auto;
}
.tab-nav .tab-btn {
  padding: 10px 18px; border: none; background: transparent;
  cursor: pointer; font-size: 14px; font-weight: 600;
  color: var(--text-muted); border-bottom: 2px solid transparent;
  margin-bottom: -2px; white-space: nowrap; transition: all .15s;
}
.tab-nav .tab-btn:hover { color: var(--primary); }
.tab-nav .tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ── Alerts ─────────────────────────────────────────────── */
.alert {
  padding: 10px 14px; border-radius: 8px; font-size: 13px;
  margin-bottom: 12px; display: none;
}
.alert.show { display: block; }
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-danger  { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-info    { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }
.alert-warning { background: #fff3cd; color: #856404; border: 1px solid #ffeeba; }

/* ── Misc ───────────────────────────────────────────────── */
.text-muted  { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mb-12 { margin-bottom: 12px; }
.gap-8 { gap: 8px; }
.flex  { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }

.spinner {
  display: inline-block; width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff; border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .scale-value { font-size: 24px; }
  .kat-btn { min-height: 64px; font-size: 16px; }
  .topbar .topbar-info { display: none; }
}