body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f8fafc;
  color: #1e3a8a;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

main {
  width: 100%;
  max-width: 1100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 20px;
}

.panel-title {
  text-align: center;
  font-size: 24px;
  color: #1e3a8a;
  margin-bottom: 20px;
}

.report-container {
  background: #fff;
  padding: 30px 40px;
  border-radius: 20px;
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
  text-align: center;
  width: 90%;
  margin: 20px auto;
}

.button-group {
  margin: 12px 0;
}

.button-group button {
  border: none;
  border-radius: 25px;
  padding: 10px 18px;
  margin: 5px;
  cursor: pointer;
  background-color: #e5e7eb;
  color: #1e3a8a;
  font-weight: 500;
  transition: all .2s ease;
}

.button-group button:hover {
  transform: scale(1.07);
}

/* Şirket aktif */
.company-selector button.active {
  background-color: #2563eb;
  color: white;
  box-shadow: 0 0 6px rgba(37,99,235,0.4);
}

/* Ay durum renkleri */
.month-selector button.uploaded {
  background-color: #22c55e;
  color: white;
  box-shadow: 0 0 8px rgba(34,197,94,0.6);
}
.month-selector button.active {
  background-color: #15803d;
  color: white;
  font-weight: 700;
  box-shadow: 0 0 10px rgba(21,128,61,0.7);
}
.month-selector button.disabled {
  background-color: #e5e7eb;
  color: #9ca3af;
  cursor: not-allowed;
  opacity: 0.5;
}

/* Yıl butonları */
.year-badge {
  background-color: #f3f4f6;
  border-radius: 20px;
  display: inline-block;
  padding: 8px 14px;
  margin: 15px auto;
}
.year-badge button {
  border: none;
  background: transparent;
  color: #1e3a8a;
  font-weight: 600;
  margin: 0 6px;
  cursor: pointer;
  transition: all .2s ease;
}
.year-badge button.active {
  background-color: #2563eb;
  color: white;
  border-radius: 12px;
  padding: 6px 10px;
  box-shadow: 0 0 8px rgba(37,99,235,0.5);
}

/* Dosya Kartları */
.report-card {
  background: #f9fafb;
  padding: 20px;
  border-radius: 16px;
  box-shadow: inset 0 0 8px rgba(0,0,0,0.05);
  margin-top: 20px;
}
.file-buttons button {
  border: none;
  border-radius: 25px;
  padding: 10px 20px;
  margin: 8px;
  font-weight: 500;
  cursor: pointer;
  background-color: #e5e7eb;
  color: #1e3a8a;
  transition: transform .1s ease, box-shadow .2s ease;
}
.file-buttons button.uploaded {
  background-color: #2563eb;
  color: white;
  box-shadow: 0 0 8px rgba(37,99,235,0.5);
}
.file-buttons button:hover {
  transform: scale(1.05);
}

footer {
  margin-top: 30px;
  text-align: center;
  color: #6b7280;
  font-size: 14px;
}

.report-container {
  background: #fff;
  padding: 30px 40px;
  border-radius: 20px;
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
  text-align: center;
  width: 90%;
  margin: 20px auto;
}

header.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(90deg, #2563eb, #1d4ed8);
  color: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 40px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  z-index: 999;
}

main {
  margin-top: 100px; /* Navbar yüksekliği kadar boşluk bırak */
}