:root {
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --success: #10b981;
  --success-light: #34d399;
  --success-dark: #059669;
  --text: #1e293b;
  --text-medium: #475569;
  --text-light: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 32px rgba(59, 130, 246, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
  background-image: radial-gradient(
      circle at 10% 20%,
      rgba(59, 130, 246, 0.05) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 90% 80%,
      rgba(37, 99, 235, 0.05) 0%,
      transparent 50%
    );
}

.activation-container {
  width: 100%;
  max-width: 480px;
  padding: 20px;
}

.activation-card {
  background: var(--white);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 40px;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.activation-card:hover {
  box-shadow: var(--shadow-hover);
}

.activation-header {
  text-align: center;
  margin-bottom: 32px;
}

.activation-icon {
  margin-bottom: 24px;
}

.icon-circle {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success);
  font-size: 32px;
}

.activation-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.activation-header p {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.5;
}

.messages-container {
  margin-bottom: 20px;
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert-success {
  background-color: #ecfdf5;
  color: #059669;
  border: 1px solid #a7f3d0;
}

.alert-error {
  background-color: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.alert-info {
  background-color: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
}

.alert-warning {
  background-color: #fffbeb;
  color: #d97706;
  border: 1px solid #fde68a;
}

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

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

.input-container {
  position: relative;
}

.input-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 18px;
  transition: var(--transition);
  z-index: 2;
}

.input-container input {
  width: 100%;
  height: 56px;
  padding: 0 16px 0 48px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text);
  background-color: #f1f5f9;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.input-container input:focus {
  outline: none;
  background-color: var(--white);
  border-color: var(--success-light);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.input-container label {
  position: absolute;
  left: 48px;
  top: 18px;
  color: var(--text-medium);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  pointer-events: none;
  z-index: 2;
}

.input-container input:focus + label,
.input-container.filled label {
  top: -8px;
  left: 40px;
  font-size: 12px;
  background: var(--white);
  padding: 0 8px;
  color: var(--success);
  z-index: 3;
}

.input-container input:focus ~ .input-icon {
  color: var(--success);
}

.input-border {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--success);
  transition: var(--transition);
}

.input-container input:focus ~ .input-border {
  width: 100%;
}

.activation-btn {
  width: 100%;
  padding: 16px;
  background: var(--success);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.activation-btn:hover {
  background: var(--success-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
}

.activation-btn i {
  transition: var(--transition);
}

.activation-btn:hover i {
  transform: translateX(3px);
}

.activation-footer {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-medium);
}

.back-to-login {
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
}

.back-to-login:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .activation-card {
    padding: 32px 24px;
  }
  
  .icon-circle {
    width: 64px;
    height: 64px;
    font-size: 24px;
  }
  
  .activation-header h1 {
    font-size: 22px;
  }
}