:root {
  --primary-color: #10b981;
  --primary-hover: #059669;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-color: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -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;
}

.portal-container {
  background: var(--card-bg);
  width: 100%;
  max-width: 480px;
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.portal-header {
  padding: 32px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: #fff;
  text-align: center;
}

.portal-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.portal-header p {
  color: #94a3b8;
  font-size: 14px;
}

.portal-body {
  padding: 32px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background-color: #fff;
  color: var(--text-color);
  transition: all 0.2s;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: bold;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2), 0 2px 4px -1px rgba(16, 185, 129, 0.1);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.result-box {
  margin-top: 32px;
  padding: 24px;
  background-color: #f0fdf4;
  border: 1px dashed var(--primary-color);
  border-radius: 12px;
  text-align: center;
  display: none;
}

.result-box.visible {
  display: block;
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-label {
  font-size: 12px;
  text-transform: uppercase;
  font-weight: bold;
  color: var(--primary-hover);
  margin-bottom: 12px;
}

.activation-key {
  font-family: 'Courier New', Courier, monospace;
  font-size: 18px;
  font-weight: bold;
  color: var(--text-color);
  letter-spacing: 1px;
  word-break: break-all;
  margin-bottom: 16px;
  user-select: all;
}

.copy-btn {
  background: #fff;
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: #f1f5f9;
}

.error-message {
  color: #ef4444;
  font-size: 14px;
  margin-top: 12px;
  text-align: center;
  display: none;
}

.error-message.visible {
  display: block;
}