:root {
  --primary: #034752;
  --primary-light: #056372;
  --primary-dark: #01282f;
  --teal: #4db7ab;
  --teal-light: #e0f4f2;
  --bg: #f1f5f7;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --green: #10b981;
  --green-bg: #ecfdf5;
  --red: #ef4444;
  --red-bg: #fef2f2;
  --orange: #f59e0b;
  --orange-bg: #fffbeb;
  --radius: 12px;
  --shadow: 0 4px 16px 0 rgba(3, 71, 82, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
}

/* Spinner Overlay */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(3, 71, 82, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.loading-overlay.active {
  display: flex;
}

.spinner-box {
  background: #ffffff;
  padding: 32px 48px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.spinner-box i {
  font-size: 40px;
  color: var(--teal);
  margin-bottom: 16px;
}

.spinner-box h4 {
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 6px;
}

.spinner-box p {
  color: var(--text-muted);
  font-size: 13px;
}

/* Giriş Ekranı */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #034752 0%, #01242a 100%);
  padding: 20px;
}

.login-card {
  background: #ffffff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.3);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--teal-light);
  color: var(--primary);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}

.login-card h2 { color: var(--primary); margin-bottom: 8px; }
.login-card p { color: var(--text-muted); font-size: 13.5px; margin-bottom: 24px; }

.form-group { margin-bottom: 18px; text-align: left; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-main); }
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
}
.form-control:focus { border-color: var(--teal); }

.btn-primary {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-primary:hover { background: var(--primary-light); }

.login-error-box {
  display: none;
  background: var(--red-bg);
  color: var(--red);
  font-size: 13px;
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 14px;
}

/* Header */
header {
  background: var(--primary);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
}
.header-brand i { color: var(--teal); font-size: 22px; }
.header-tag {
  background: rgba(77, 183, 171, 0.2);
  color: var(--teal);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.header-actions { display: flex; gap: 10px; }
.btn-light {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}
.btn-light:hover { background: rgba(255,255,255,0.22); }
.btn-logout:hover { background: var(--red); border-color: var(--red); }

/* Navigasyon Tabları */
nav.nav-tabs {
  background: #ffffff;
  padding: 0 24px;
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  padding: 14px 18px;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--teal);
}

/* Filtre Barı */
.filter-bar {
  background: #ffffff;
  padding: 14px 24px;
  margin: 16px 24px 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.filter-label { font-size: 13px; font-weight: 700; color: var(--primary); }
.preset-buttons { display: flex; gap: 6px; flex-wrap: wrap; }
.preset-btn {
  padding: 7px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.preset-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-teal { background: var(--teal); color: #fff; border: none; }
.btn-teal:hover { background: #3da397; }
.custom-dates { display: flex; align-items: center; gap: 6px; }

/* KPI Grid */
.kpi-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 16px 24px 0;
}

.kpi-card {
  background: var(--card-bg);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 4px solid var(--teal);
}
.kpi-card.profit { border-left-color: var(--green); }
.kpi-card.warning { border-left-color: var(--orange); }
.kpi-card.danger { border-left-color: var(--red); }
.kpi-card.primary { border-left-color: var(--primary); }

.kpi-title { font-size: 12px; color: var(--text-muted); font-weight: 700; text-transform: uppercase; margin-bottom: 6px; }
.kpi-value { font-size: 22px; font-weight: 800; color: var(--primary); }
.kpi-sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Ana Tablo Kartı */
.main-content {
  margin: 16px 24px 40px;
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.table-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 14px;
}

.toolbar-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.search-box { position: relative; }
.search-icon { position: absolute; left: 12px; top: 12px; color: var(--text-muted); font-size: 13px; }
.search-input { padding-left: 34px; width: 280px; }

.filter-pill {
  padding: 6px 10px;
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.filter-pill.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Tablolar & Sıralama (Sort) */
.table-responsive { width: 100%; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }

th {
  background: #f8fafc;
  color: var(--text-muted);
  font-weight: 700;
  padding: 12px 14px;
  border-bottom: 2px solid var(--border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
th:hover { color: var(--primary); background: #f1f5f9; }
th.sort-asc::after { content: " ▲"; font-size: 10px; color: var(--teal); }
th.sort-desc::after { content: " ▼"; font-size: 10px; color: var(--teal); }

td { padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:hover { background: #f8fbfa; }

/* Rozetler */
.badge { display: inline-block; padding: 4px 8px; border-radius: 6px; font-size: 11.5px; font-weight: 700; }
.badge-in { background: var(--green-bg); color: var(--green); }
.badge-out { background: var(--red-bg); color: var(--red); }
.badge-warning { background: var(--orange-bg); color: var(--orange); }
.badge-dead { background: #f1f5f9; color: #475569; border: 1px dashed #cbd5e1; }

.badge-trendyol { background: #fef0e6; color: #f27a1a; }
.badge-hepsiburada { background: #fff1eb; color: #ff6000; }
.badge-farmazon { background: #e0f2fe; color: #0284c7; }
.badge-n11 { background: #fee2e2; color: #ef4444; }
.badge-platform { background: #f1f5f9; color: #334155; }

.val-green { color: var(--green); font-weight: 700; }
.val-red { color: var(--red); font-weight: 700; }

.product-link { color: var(--primary); text-decoration: none; font-weight: 600; cursor: pointer; }
.product-link:hover { color: var(--teal); text-decoration: underline; }

/* Modal */
.modal-backdrop {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(3, 71, 82, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-backdrop.open { display: flex; }
.modal-box {
  background: #ffffff;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  border-radius: 16px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-header {
  background: var(--primary);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-body { padding: 20px; overflow-y: auto; }
.close-modal { background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; }

/* Genel Bakış Özel Kartları */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 10px;
}
@media (max-width: 900px) {
  .overview-grid { grid-template-columns: 1fr; }
}
.overview-card {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.overview-card h4 {
  color: var(--primary);
  font-size: 15px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}