:root {
  --primary-color: #0082c9;
  --primary-hover: #00669e;
  --bg-color: #f4f7f9;
  --card-bg: #ffffff;
  --text-color: #222222;
  --border-color: #dcdfe6;
  --success-color: #2e7d32;
  --error-color: #c62828;
  --warning-color: #f57f17;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.upload-container {
  background-color: var(--card-bg);
  width: 100%;
  max-width: 480px;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.header h2 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.header p {
  font-size: 0.9rem;
  color: #666;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.form-group input[type="password"] {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input[type="password"]:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Strefa przeciągania pliku */
.file-drop-zone {
  position: relative;
  border: 2px dashed var(--primary-color);
  border-radius: 8px;
  background-color: #f4f9fd;
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.file-drop-zone:hover, .file-drop-zone.dragover {
  border-color: var(--primary-hover);
  background-color: #e6f3fb;
}

.file-drop-zone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.drop-zone-prompt p {
  margin: 0;
  color: #555;
  font-size: 0.9rem;
  pointer-events: none;
  line-height: 1.4;
}

.drop-zone-prompt strong {
  color: var(--primary-color);
}

/* KONTENER LISTY PLIKÓW OSADZONY W ŚRODKU POLA */
.file-list-container {
  position: relative;
  z-index: 2;
  margin-top: 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  text-align: left;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.file-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: #555;
  font-weight: 600;
}

.clear-all-btn {
  background-color: #ffebee;
  border: 1px solid #ef9a9a;
  color: var(--error-color);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.clear-all-btn:hover {
  background-color: #ffcdd2;
}

.file-list {
  max-height: 140px;
  overflow-y: auto;
  padding-right: 4px;
}

.file-list::-webkit-scrollbar {
  width: 5px;
}

.file-list::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 4px;
}

/* Styl pojedynczej karty pliku */
.file-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  margin-bottom: 6px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.85rem;
}

.file-item-name {
  color: var(--text-color);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 10px;
}

/* Okrągły przycisk "X" */
.remove-file-btn {
  background: #e2e8f0;
  border: none;
  color: #64748b;
  font-size: 0.9rem;
  font-weight: bold;
  cursor: pointer;
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: all 0.15s;
}

.remove-file-btn:hover {
  color: #ffffff;
  background-color: var(--error-color);
}

.submit-btn {
  width: 100%;
  padding: 12px;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.submit-btn:hover {
  background-color: var(--primary-hover);
}

.submit-btn:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

/* Alert komunikatów z animacją płynnego pojawiania i znikania */
.status-message {
  margin-bottom: 16px;
  padding: 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  display: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.status-message.visible {
  opacity: 1;
  transform: translateY(0);
}

.status-message.success {
  background-color: #e8f5e9;
  color: var(--success-color);
  border: 1px solid #a5d6a7;
}

.status-message.warning {
  background-color: #fffde7;
  color: var(--warning-color);
  border: 1px solid #fff59d;
}

.status-message.error {
  background-color: #ffebee;
  color: var(--error-color);
  border: 1px solid #ef9a9a;
}

.hidden {
  display: none;
}

.user-welcome {
  background-color: #e8f4f8;
  border-left: 4px solid var(--primary-color);
  padding: 10px 14px;
  margin-bottom: 20px;
  border-radius: 4px;
  font-size: 0.95rem;
  color: #005580;
}

.portal-logo {
    display: block;
    max-width: 220px;
    width: 70%;
    height: auto;
    margin: 0 auto 20px auto;
}