:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --border: #d4d0c8;
  --text: #2c2c2c;
  --text-muted: #6b6560;
  --accent: #3a6b5a;
  --accent-hover: #2d5446;
  --accent-light: #e8f0ec;
  --error: #a63d2f;
  --error-bg: #fdf0ee;
  --success: #3a6b5a;
  --success-bg: #e8f0ec;
  --radius: 6px;
}

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

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.75rem;
}

.tab {
  flex: 1;
  padding: 0.7rem 1rem;
  text-align: center;
  cursor: pointer;
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  font-size: 1.2rem;
  color: var(--text-muted);
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.tab:hover { color: var(--text); }

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 1.25rem;
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
}

.drop-zone .icon {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  display: block;
  opacity: 0.5;
}

.drop-zone .file-name {
  margin-top: 0.75rem;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

input[type=file] { display: none; }

.field { margin-bottom: 1.25rem; }

.field label {
  display: block;
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.password-wrapper {
  position: relative;
  display: flex;
}

.password-wrapper input {
  flex: 1;
  padding: 0.6rem 2.8rem 0.6rem 0.75rem;
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
}

.password-wrapper input:focus {
  border-color: var(--accent);
}

.toggle-pw {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-muted);
  padding: 0.25rem;
  line-height: 1;
}

.btn {
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s;
  letter-spacing: 0.01em;
}

.btn:hover { background: var(--accent-hover); }

.btn:disabled {
  background: var(--border);
  cursor: not-allowed;
}

.message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  font-size: 0.85rem;
  display: none;
}

.message.error {
  background: var(--error-bg);
  color: var(--error);
  display: block;
}

.message.success {
  background: var(--success-bg);
  color: var(--success);
  display: block;
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 1rem;
  overflow: hidden;
  display: none;
}

.progress-bar.active { display: block; }

.progress-bar .fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s;
  width: 0%;
}

.info-text {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
  line-height: 1.6;
}

.privacy-link {margin:2rem 0 -1rem 0;}

@media (max-width: 480px) {
  body { padding: 1rem 0.75rem; }
  .card { padding: 1.25rem; }
}